The Role of Travel Motivations and Social Media Use in Consumer Interactive Behaviour: A Uses and Gratiﬁcations Perspective

: This paper explores the inﬂuence of travel motivations and the gratiﬁcation provided by social media in consumer stickiness to social media, intention to create user-generated content, and electronic word of mouth (eWOM) review adoption. The study follows a mixed-methods approach. First, a concept mapping study was undertaken to identify the main travel motivations and the gratiﬁcations provided by social media when consumers search for information on tourism destinations. A second study using structural equation modelling and SmartPLS 3.2.7 with a sample of 401 heavy users of social media showed the relationships between individual travel motivations and gratiﬁcations provided by social media and consumer stickiness, intention to share user-generated content (UGC), and eWOM review adoption.


Introduction
Over the last decade, the emergence of user-generated content (UGC) on social media has revolutionised tourists' perceptions, attitudes, and even behaviours with regard to destinations, hotels, and restaurants [1,2].Travellers increasingly visit social media to search for travel-related information, including online reviews, because they believe comments and experiences posted by other consumers help them make better destination choices [3].This trend is closely related to some tourism characteristics (e.g., intangibility and experience).UGC improves tourists' decision-making and increases their information about destinations, generating social capital [4,5].
Motivations have long been a critical topic in tourism and consumer behaviour [6,7] as they provoke and guide individual behaviours [8].The extant tourism literature indicates that travel motivations underlie travellers' decision-making processes and are key triggers of purchasing behaviours [6,[9][10][11].Hence, a research question arises about the understanding of the role of travel motivations in consumer behaviour on social media when they search for travel-related information.
Tourists' travel motivations and the uses and gratifications theory (UGT) have been jointly used in the conceptual framework in this analysis.UGT helps to explain the functions of the medium for the individual [12], and furthers the understanding of why individuals use social media to satisfy their needs and, therefore, what main gratifications they obtain from tourism-based social media.The general idea is that individuals seek gratifications of their needs from social media content.The understanding of why, and how, specific activities (including those related to posting and sharing travel information) are undertaken on social media is, as yet, quite limited [13][14][15].More specifically, social media support a broad range of activities, and its use and the gratifications it provides vary considerably among users [14].Understanding the gratifications individuals seek, and obtain, when searching for information about tourism destinations provides a richer picture of their interactive behaviour.
Stickiness is the ability of websites to attract and retain customers so that they will buy goods/services, or view more advertisements [16].This ability has been recognised as one of the keys to profitability.It is in the best interests of online travel communities to retain visitors for as long as they can, since the probability of them booking a trip or viewing an advertisement increases with the time they stay on the site [17].As a result of repeat traffic and increased time spent on sites, customers become stickier to social media.Despite all the efforts that they put into creating stickiness, what makes customers stick around is still vague to social media managers.Given the increasing competition in the hospitality industry, it is important for managers to identify the drivers of the individual's intention to post and adopt the advice of electronic word of mouth (eWOM) reviews posted on social media, as this has considerable influence on his or her information processing and decision-making [18][19][20].
This study explores the influence of travel motivations and the gratifications provided by social media in customer interactive behaviour.The study integrates individual and social motivations to travel with the gratifications obtained through using social media for tourism purposes.It is expected that the study will enrich previous research into uses and gratifications and UGC.The work is divided into two parts.The first part, the theoretical part, presents the literature review, the working hypotheses, and the methodology.The second follows a mixed-methods' approach.First, a concept mapping study is undertaken to identify the uses and gratifications of social media and travel motivations when consumers search for information on tourism destinations.A second study, using structural equation modelling with SmartPLS 3.2.7,with a sample of 401 heavy users of social media, examines the impact of relationships between individual travel motivations and the gratifications provided by social media on: consumer stickiness, intention to share UGC, and eWOM review adoption.

Uses and Gratifications Theory and Social Media
The uses and gratifications theory (UGT) identifies why people use certain media [21].Scholars have utilized the theory to understand the different gratifications that individuals seek from the use of social media to perform specific activities [22].UGT posits that audience members are active and goal-oriented consumers of media who select media and messages to satisfy their needs.They are aware of their interests and motives and have certain expectations that lead them to choose certain media and types of gratification [23].
Some authors negatively criticise UGT.Reference [24] showed the conceptual ambiguities and inconsistencies of the UGT, and Reference [25] doubted its definition and measurement of gratification.Reference [26] showed that the UGT provides lists only of reasons why audiences employ certain media.Nevertheless, many researchers consider the UGT as one of the most influential theories in the field of communication research [27].The UGT is especially well suited to examine the use of social media because of its high levels of involvement [27], bonding social capital [28], participant interactivity [29], and positive vs. negative brand communication [30].Through social media tourism destinations can provide value and/or gratification for tourists by optimising the content they produce.Recent research has shown that the gratifications provided by social media platforms have a significant influence on continuance intentions [31].The UGT can explain, not only why consumers use social media, but also why they are willing to stay longer when searching for, or sharing, tourism information (social media stickiness).The theory also suggests that gratifications influence users' attitudes, and that those attitudes guide users' actual usage [32], and travel behaviours [33].
An increasing number of researchers have adopted UGT to explain the gratifications obtained from social media.In accordance with previous research, we acknowledge the need for a comprehensive and systematic literature review that provides a full understanding of the current knowledge of the topic as applied to the tourism field.Table 1 in Annex 1 presents the main findings of recent studies into UGT and tourism-based social media.Previous studies have identified social enhancement, entertainment and self-expression as some of the key gratifications obtained from social media use (see Table 1).Drawing on UGT and concept mapping research, the present study anticipates that consumers will use social media for tourism purposes to gratify their needs for entertainment, knowledge sharing, and social enhancement.
The entertainment construct of UGT refers to the extent to which social media content gives hedonic value to consumers [39].The UGT proposes that consumers use social media to find fun, escapism, and spontaneity [30,40].This hedonic value increases when virtual environments stimulate the consumer's imagination.The travel-based content on social media today offers consumers high entertainment value by allowing them to share photographs and comments.The informational construct of UGT (information sharing) represents the extent to which social media content allows users to create and share helpful information [30].Tourists find social media comfortable places to reveal their feelings about trips or destinations, share views and experiences, and inform their family and friends about their tourism experiences.The social construct of UGT (social enhancement) refers to the extent to which social media content helps users to express their personalities, gain peer-support, and develop a sense of belonging to a group of friends, family, and society, substituting real-life partnerships [41].The expression of identity or status positively reinforces individuals' attitudes towards use of the medium or service [42,43].

Effects of the Gratifications Provided by Social Media Use on Consumer Interactive Behaviour
In this research social media stickiness is measured through the time spent by consumers on social media platforms looking for information about tourism destinations.Media stickiness increases in line with the individual's perceived value of social media content [44].Recent research has highlighted that gratifications are key drivers of social media use [33,35,37].Reference [45] found that entertainment, expressive information sharing, and social interaction gratifications predict online travel communities' ability to retain users.Therefore, we have the following hypothesis: Hypothesis 1 (H1).The gratifications obtained from social media use for tourism purposes positively influence consumers' stickiness towards social media.
The gratifications provided by social media use have been associated to UGC sharing behaviour.Entertainment gratification has been associated with link sharing [46], news sharing [47], online advertisement sharing [48], photo sharing [15], and tourism related sponsored-ad sharing [36].Expressive information sharing refers to the need to share information about travel experiences with others.Recent studies in online contexts have validated the positive effect of knowledge sharing gratification [15,46,[49][50][51] on UGC sharing in non-commercial environments.Social gratifications represent the individual's perception of how his/her actions are viewed by others.In self-enhancement gratification, individuals feel the need to share personal experiences to be perceived as "cool" by other users.Social media enable travellers to share photographs and manage their desired self-images and keep abreast of the latest tourism destination trends.Thus, consumers see social media as symbols of social identity, which help them to reinforce their sense of belonging to a specific group of travellers.The possibility of enhancing one's reputation is an important driver for sharing UGC [52,53].Individuals who desire social enhancement perceive more utility in engaging in behaviours that increase their feelings of personal worth and lead to higher social status in the travel community [40].
The gratifications obtained through social media condition consumers' evaluations of tourism experiences, which can be reflected in their desire to transmit information to other consumers and in the comments they post [54].Reference [55] found that UGC exchanges about airline services had a positive effect on the individual's willingness to engage in positive eWOM.Reference [56] showed a positive association between the perceived benefits of social media use and continuance intentions to create UGC on social media.It is proposed that, when consumers use social media for tourism purposes, they obtain entertainment, expressive information sharing, and social gratifications, which in turn, positively influence their continuance intentions to create UGC on social media about their tourism experiences.

Hypothesis 2 (H2).
Gratifications obtained from social media use for tourism purposes positively influence consumers' continuance intention to create user-generated content.
UGC has higher influence than firm-generated content on consumer decision-making [57].Ha et al. [32] posited that gratifications obtained by social media use positively influence consumers' attitudes towards social media.Reference [58] showed that eWOM on social media is an important driver of consumer choice of tourism destinations.Reference [20] demonstrated that the informative content and pleasure elicited by UGC on social media has a positive influence on consumers' willingness to follow advice provided on social media about visiting a restaurant.Therefore, we posit that the gratifications provided by social media positively influence eWOM review adoption.

Hypothesis 3 (H3).
The gratifications obtained from social media use for tourism purposes positively influence consumers' eWOM review adoption.

Travel Motivations and Consumer Interactive Behaviour
Reference [59]'s study into travel motivations asked, "what makes tourists travel?"Adapting this question (see Reference [59]), the present study is designed to answer the question, "what makes social media users travel to a tourism destination for leisure?".The push and pull framework has been most commonly used to explain travel motivations [60,61].People travel because they are pushed by internal forces (e.g., desire for escape, rest, relaxation, prestige, adventure, social interaction), and, at the same time, pulled by external forces such as interest in a destination's attributes [62].Reference [63] argued that two motivational forces influence tourists: (a) the desire to leave the everyday environment behind and (b) the desire to obtain psychological rewards through travel in an environment that contrasts with the home environment.
This study investigates the impact of four push travel motivations (leisure, relaxation, learning/discover, and social bonding) for visiting a tourism destination on consumers' interactive behaviour on social media.Leisure motivation, which is related to adventure seeking and the wish to enjoy exciting experiences, influences destination choice [64,65].Relaxation motivation encompasses the need for escape.Escape-driven travellers are eager to enjoy physical and social breaks from their everyday living and working environments [66].The learning/discover dimension relates to individuals' aspirations to find new/different experiences and knowledge, and alleviate boredom [67].Learning and discovering something new is similar to enjoying novel vacation experiences [66,68].Social bonding is the process of the development/facilitation of relationships with others [36].Individuals, however, can also develop relationships among groups on social media, focused on sharing experiences, for example, about leisure, travel, etc. [69] pointed out that travel motivations predispose people to participate in tourist activities.Reference [70] described tourism motivations as individuals' activated psychological states that direct them towards the fulfilment of tourism needs.When travellers' needs are stimulated, they form travel motivations, which drive them to take actions to meet their tourism needs and decrease tension [10].
In travellers' decision-making, individuals choose, encode, process, and remember most information provided by social media in ways consistent with their travel motivations.Social media allow travellers to follow topics of interest and provide the chance to receive constant updates from other users.Travel motivation is increased by social media use, and an emotional connection and expectations are created before a destination is experienced [71].Reference [72] demonstrated that push travel motivations can predict the type of content that different traveller segments prefer to view on social media.Reference [73] argued that the motivation to obtain updated information drives intensity of social media use.Therefore, we propose that the stronger are the tourist's travel motivations, the greater will be his/her stickiness to the social media that can help him/her fulfil his/her needs in ways consistent with his/her travel motivations.

Hypothesis 4a (H4a).
Leisure travel motivation positively influences consumer stickiness to social media.

Hypothesis 4b (H4b).
Relaxation travel motivation positively influences consumer stickiness to social media.
Word of mouth behaviour in the tourism context is an integrative process initiated by a tourism experience [74], and subsequently spread on social media [75].During their travels, tourists tend to express their feelings on social media and to co-create value with tourism providers and other consumers.Reference [76] evidenced the positive impact of social-bonding travel motivations and relaxation and adventure on tourists who took boat trips intention to recommend these tours.Reference [77] identified travel motivations related to social bonding (e.g., travelling with family/friends to boost relationships), seeking new experiences, relaxation, and leisure (e.g., enjoying a city's cuisine, sightseeing), that significantly influenced visitor intention to recommend cultural attractions.Reference [78] posited that individual travel motivations influence photo-sharing on social media.Reference [79] suggested that the enjoyment motivation affects travel-experience sharing on social media.Therefore, we posit that travel motivations influence the consumer's intention to create user-generated content on social media.

Hypothesis 5a (H5a).
Leisure travel motivation positively influences continuance intention to create user-generated content.

Hypothesis 5b (H5b).
Relaxation travel motivation positively influences continuance intention to create user-generated content.

Hypothesis 5c (H5c).
Learning/discover travel motivation positively influences continuance intention to create user-generated content.

Hypothesis 5d (H5d). Social-bonding travel motivation positively influences continuance intention to create user-generated content.
Motivation is one of the core theoretical issues of consumer behaviour in tourism [60] because it helps to explain why people revisit certain destinations [76].However, while travel motivations have emerged as an influential factor that affect tourists' post-purchase behaviours, their impact is not homogenous, given the diversity of tourism activities and destinations [76,[80][81][82][83][84].For example, tourists visiting cultural destinations are driven by knowledge motivations [80]; consumers' revisit intentions towards nature-based destinations are motivated by pursuing new types of travel [81]; and tourists travelling to leisure destinations are mainly motivated by escaping from routine [82].Reference [76] found three types of travel motivations: social, utilitarian, and hedonic motivations influenced boat tour participants' intention to retake the tours.Reference [83] found that, among other motivations, adventure and relaxation increased travellers' intentions to undertake space trips.[84] found that leisure and social-bonding motivations (visiting family and friends) had a significant influence on the visiting intentions towards a tourism destination among repeat travellers.We conceptualise eWOM adoption as the intention to follow advice to visit a tourism destination based on the comments, recommendations, and suggestions posted on social media by other travellers.The present study extends previous works by focusing on the influence of travel motivations on consumer interactive behaviour.Therefore, we posit that travel motivations positively influence the consumer's adoption of eWOM posted on social media.

Stickiness, User-Generated Content, and eWOM Review Adoption
In this research, stickiness to social media is defined as the user's willingness to return to and prolong his or her visits to social media for tourism purposes [85].Stickiness to social media can be shown in the form of revisits.Reference [86] showed that more loyal consumers visited and used particular websites more frequently, increasing stickiness to those sites.In the context of company social networks, Reference [87] argued that stickiness influenced WOM.Recent research [74] has shown that extensive use of social media reinforces tourists' perceptions and evaluations of aspects of their visits, which allows their social media contacts to benefit from their sharing of their travel experiences and recommendations about destinations [88].Therefore, we get the following hypothesis: Hypothesis 7 (H7).Stickiness to social media positively influences continuance intention to create user-generated content.
Customers' stickiness to social media is formed when they adopt a positive attitude towards the contents of the social media and develop loyal behaviour, such as attachment [89].Reference [19] found that attitude towards the advice obtained in an online travel community had a positive influence on traveller intention to follow that advice.Taking these points into account, we adapt this relationship to our analysis context and propose that stickiness to travel-related content on social media will positively influence the traveller's adoption of eWOM.

Hypothesis 8 (H8). Stickiness to social media positively influences eWOM review adoption.
Figure 1 shows the research model.

Methods
This study adopts a mixed-method research approach [90].Mixed methods offer a better understanding of research problems by triangulating sets of results and, thus, enhancing the validity of inferences.Accordingly, a two-step study was implemented.First, a qualitative analysis, employing a concept mapping design [91], using heavy users of social media for tourism-related purposes, was carried out.Second, a quantitative analysis using PLS was conducted, with 401 heavy users of social media, to estimate the conceptual model.

Study 1: Concept Mapping
The main goal of study 1 was to identify and refine scales to measure the model's core constructs, the gratifications provided by social media and travel motivations.Gratifications are a complex, multidimensional, and formative construct, and the previous literature provides no standardised scales.We decided to develop concept mapping [91], a mixed method that generates concept maps, using multidimensional scaling (i.e., MDS), and cluster analysis derived from focus group results.This technique is employed in scale development studies [92] to confirm the dimensionality of complex constructs and identify key items.
The focus group comprised of 12 tourist users of social media services [91].They were asked to create a list of their travel motivations and explain why, when, and how they used social media platforms for travel purposes.The participants then shared their opinions with the group.Using MDS and cluster analysis we obtained the concept mapping for the gratifications and travel motivations of the whole group.Thereafter, a consensus was reached as to the grouping of the various dimensions, and any ambiguities were eliminated.In sum, the results of study 1 were used to refine the dimensionalisation and items for the gratifications and travel motivations variables.

Design and Sample
To verify the proposed hypotheses and estimate the conceptual model, an empirical study was carried out with data gathered by an online survey, using a structured questionnaire.The questionnaire was initially revised by two experts on tourism, using a small sub-sample (n = 18) of the study population, consumers over 18 years of age that use social media for tourism purposes.This revision ensured that the questionnaire gathered all the relevant information, addressed misinterpretations and misunderstandings in some of the questions, and allowed us to improve the adaptation of some of the scales to the study context.This pre-test ensured the content validity of the scales.
The study population claimed to frequently (92% at least once a month) use social media as a source of touristic information.The study was conducted in Spain.The data were collected between January and March 2019.The sample was selected on the basis of age and gender quotas to ensure it largely reflected the socio-demographic profile of Spanish Internet users, according to [93].We used the convenience sampling procedure; the questionnaire was distributed through social network profiles and ad hoc email lists among tourists who had used social media as a source of tourist information in the previous year, e.g., through the non-travel-specific social networks Facebook, Instagram, and YouTube, and the travel-specific sites Booking.com and TripAdvisor.com,or personal travel blogs.
A total of 401 individuals returned valid responses.Table 2 shows the sociodemographic profiles and behavioural characteristics of the sample.The sample had a balanced ratio of men (56%) and women (44%), most being under 35 (54%).More than half (58%) of the sample had university degrees and were employed (60%).Some 64% of the sample used social media platforms daily to post, share, or like information in the previous three months, and 75% have read information on social media daily in the previous three months.Finally, 89% of the sample had posted tourism-related information on social media in the previous year.

Measures
Gratifications provided by social media use were measured as second order constructs formatively related to their dimensions; these dimensions are reflectively related to their indicators.This theoretical structure was estimated by using the "repeated indicator approach" [94] of the partial least squares (PLS) algorithm.Although the previous literature contains negative criticisms about the functionality of the PLS-SEM algorithm in business and management research [95,96], the approach has also been supported in recent studies [97,98] as a structural modelling technique that allows the incorporation of second-order constructs of a formative nature (as is our case); this avoids model identification problems [99][100][101].The parameters were estimated by using Smart-PLS 3.0 [102]; 5000 samples were bootstrapped to calculate the significance of the parameters.
The scales, all seven-point Likert-type, used in the questionnaire to measure the constructs were taken from previous studies in the academic literature.Table 3 shows the detailed scale items and the main statistics of each variable (mean and standard deviations).
Uses and gratifications was estimated as a second-order factor formatively configured, based on the results of the concept mapping technique (study 1), and the scales of References [103] and [104], through three dimensions: (i) expressive information sharing-3 scale items; (ii) entertainment-4 items; and (iii) social enhancement-3 items.Travel motivations were measured on a scale developed by [61], and based on the results of study 1.We identified four travel motivations: (i) leisure-3 items; (ii) relaxation-3 items; (iii) learning/discover-4 items; and (iv) social bonding-3 items.Stickiness was measured on a 3-item scale developed by [105], adapted to the context of this research.Continuance intention to create user-generated content was measured by adapting Reference [106]'s 4-item scale; eWOM review adoption was measured by using 4 items adapted from Reference [107]'s scale.

Psychometric Properties of the Measurement Instrument
The indicators demonstrated the high internal consistency of the constructs (see Table 4).In all cases, Cronbach's alpha exceeded Reference [108]'s recommendation of 0.70.Composite reliability represents the shared variance among a set of observed variables measuring an underlying construct [109].Generally, a composite reliability of at least 0.60 is considered desirable [110].This requirement was met for all factors.The average variance extracted (AVE) was also calculated for all constructs; the AVEs were greater than 0.50 [108].As evidence of convergent validity, the results indicated that all items were significantly (p < 0.01) related to their hypothesised factors, and the standardised loadings were at least 0.60 [109].Table 4 shows the individual loads for each item and the construct reliability.The average variance extracted test [109] was used to evaluate discriminant validity: The test verifies that the square of the covariance of each pair of factors is less than the variance extracted from each of the factors.These conditions were met for all factors (see Table 5), confirming the discriminant validity of the measurement model.The second criterion used was the Heterotrait-Monotrait (HTMT) ratio [111]; this criterion was established by Reference [112] to verify discriminant validity.This requires ratio values lower than 0.90.In Table 6 it can be seen that this criterion is, indeed, achieved, thus the measurement model has discriminant validity.

Results and Discussion
The psychometric properties of the measurement model were evaluated and tested; the results are presented in terms of the structural relationships and their parameters, and the degree of fulfilment of the hypotheses.Table 7 shows that the coefficients of the relationships are statistically significant at 99% confidence level (t > 2.58), and that all the hypotheses of the theoretical model are supported.The findings confirmed the direct positive relationship between gratifications provided by social media and the three behavioural variables analysed.In terms of the order of the intensity of the relationships, gratifications positively influence stickiness (H1 supported; β = 0.29 **), UGC (H2 supported; β = 0.25 **), and eWOM review adoption (H3 supported; β = 0.17 **).This result extends previous findings [39,41,45] and suggests that entertainment and expressive information sharing are important drivers of consumers' higher intentions to continue using social media, and information share.Consumers stick to social media to exchange travel information because they see them as (i) providing ways to have fun with entertaining content, (ii) as instruments for increasing their social status as they perceive that it is "cool" to be seen to be part of the conversation, and (iii) as important tools for exchanging knowledge and advice on travel destinations with friends, relatives, and other travellers.Social networks are fundamentally participatory; and sharing content on them is both a form of expression and a means of building relationships [113].
Travel motivations had a heterogeneous effect on consumer interactive behaviour.Leisure and relaxing travel motivations had no influence on any of the three variables analysed: stickiness (H4a not supported; β = 0.11; H4b not supported; β = −0.01),UGC (H5a not supported; β = −0.08;H5b not supported; β = 0.06), and eWOM review adoption (H6a not supported; β = 0.02; H6b not supported; β = 0.05).These results may arise because often relaxation-and leisure-driven consumers want to actually experience destinations, and are not interested in what, to them, are irrelevant social media interactions.As Reference [114] pointed out, for tourists to want to share experiences, those experiences have to be unique and memorable, and, the more senses an experience involves, the more effective and memorable it can be.Another explanation may be that the influence of intrinsic motivations (leisure and relaxation) on consumer interactive behaviour are affected by the type of social media used by the respondents to look for and/or exchange tourism information.This is in line with Reference [115]'s study, which de-emphasised the importance of the perceived enjoyment motivation for travel planning when using non-travel-specific social media for decision-making before a leisure trip.
Learning/discover had a positive effect on stickiness (H4c supported; β = 0.12 *) and a positive, strong effect on eWOM review adoption (H6c supported; β = 0.33 **).These findings support previous research that argued that tourism motivations direct consumers towards the fulfilment of tourist needs in online travel communities (see Reference [10]), and influence consumers to follow advice to choose certain tourism destinations [81,82].Motivations dispose consumers to decide to travel, and are subsequently interpretable by others as valid explanations to take travel-related decisions.However, the learning/discover motivation negatively impacts on UGC (H5c not supported; β = −0.13**).One explanation for this result may be that tourists will not post information when they perceive that the costs of knowledge sharing might exceed the benefits they will receive from the knowledge sharing [116].
The social-bonding motivation had a direct and positive effect on stickiness (H4d supported; β = 0.36 **) and UGC (H5d supported; β = 0.22 **).Social media generate social benefits related to not only the possibility of collecting information and reviews from peers before a trip, but also to sharing information during and after a trip and maintaining relationships within a social media community [115].Social desirability compels travellers to stick to social media and recommend leisure tourism activities.This result extends the findings of previous research on the effects of social motivations on word-of-mouth in offline settings [76,77].Social bonding did not influence eWOM review adoption (H6d not supported; β = −0.11).This result would seem, indeed, logical, given that social-bonding-related motivations are not obviously fulfilled by accepting recommendations from other travellers.Prospective travellers in search of tourism information driven by social motivations might be more interested in browsing and commenting on other travellers' social media content, such as photographs, videos, and comments (social-bonding motivation), rather than in the outcome of the information search process per se (visiting a destination).
If we focus on consumer interactive behaviour, stickiness influenced eWOM review adoption (H8 supported; β = 0.34 **) and continuance intention to create UGC (H7 supported; β = 0.57 **).These results are in line with recent research that argues that stickiness intention is a surrogate for behavioural loyalty to a website [117,118].Therefore, stickiness can encourage travellers to post WOM [87] and generate a positive attitude towards advice obtained in online travel communities, which, in turn, increases the traveller's intention to adopt the eWOM [119].Figure 2 shows the results of the model estimation.

Conclusions
This work contributes to the literature in several ways.First, by extending and adapting the concept of stickiness to the online travel communities' context, this study enriches the theoretical understanding of stickiness.Whereas previous studies have focused mainly on the antecedents of users' stickiness to websites, in this research, the impact of stickiness on consumer interactive behaviour is revealed.Overall, the model explains 66% of the variance of continuance intention to create user-generated content, 55% of the variance of stickiness, and 41% of the variance of eWOM review adoption.
Second, this study increases understanding of the theoretical mechanisms that underlie the development of travellers' stickiness.The UGT suggests that media use is motivated by needs and goals, while motivation theory proposes that consumer interactive behaviour is influenced by psychological states that direct consumers towards the fulfilment of tourism needs.Gratifications and motivations are found to have a significant impact on stickiness and sharing information behaviour, and the relationships of these factors are verified by UGT and motivation theory.Therefore, consumers will stick to a social media site to exchange travel information when their individual gratifications are met by the social media content.The results also indicated that push motivations have a heterogeneous influence on travellers' continuance usage intention, UGC, and intention to adopt the eWOM.The results verified that consumers' stickiness to online travel communities is a consequence of psychological drivers (i.e., learning/discover, social-bonding travel motivations, and the gratifications provided by social media).Most studies into stickiness have focused on demonstrating the influence of customer satisfaction, relationship commitment, and trust, in predicting consumers' stickiness in the contexts of B2C and B2B [117,118].The present study innovatively adopts a new perspective by jointly examining two internal factors, travel motivations and gratifications, in an investigation into consumers' stickiness in the online travel communities' context.Our research findings provide insights into the adoption of psychological perspectives to effectively identify and investigate the key success factors that tourism companies must take into account in their social media operations.This study highlights the importance of gratifications provided by social media and consumer travel motivations because they have a direct, significant influence on social media stickiness, an essential variable for guaranteeing online travel community success.The gratifications obtained through social media condition the consumer's attachment to an online travel community, which can be reflected in his/her desire to transmit information to other consumers and in his/her intention to adopt the eWOM provided in social media.This research has analysed the functions of an online travel community from the consumer perspective and examined the gratifications provided by tourism-related information on social media to their readers.
The gratifications stemming from social-media use reinforce consumer interactive behaviour, which must be taken into account when designing online travel platforms.We can conclude that users stick to social media to share travel experiences with their friends/relatives/acquaintances, to amuse themselves and, to a lesser extent, to achieve social enhancement.Given the importance of information sharing gratification, online travel communities and tourism companies should include elements, such as frequently asked questions, blogs, virtual communities (spaces where a specific topic is discussed in connection with what the website offers), and discussion forums (general and specific), so that, by monitoring them, the companies can gather information on the participants and, thus, improve their services, and even the website itself.The impact of learning/discover and social bonding on stickiness to social media highlights the need for destination management organisations to take these travel motivations into account.The learning/discover travel motivation can be reinforced by the consumer's anticipation of the travel-related experiences.This sensation can be achieved by including attractive contents with audio-visual elements, such as videos, pictures, or music.Data might be provided on nearby tourist resources, such as museums; unique buildings of civil, military, or religious natures; and natural features, such as landscapes, cliffs, waterfalls, etc. Virtual reality tools can also give tourists alternative ways of learning, thus creating unique experiences.The feeling of belonging (social bonding) to the destination being visited plays an important role in stickiness and in the cultivation of intention to continue to create travel-related UGC.As Reference [120] found out in the context of heritage sites, in order to achieve customer loyalty unique experiences, novelty and the opportunity to explore tourist sites must be promoted.Photographs of, and information about, the destination might depict local traditions, festivities, etc. Destination Marketing Organizations (DMOs) should set up events that allow potential tourists to meet local people/connect with their culture (for example, in Malaysian jungle trips, tourists might be taken to see the indigenous jungle people making handicrafts with natural, sustainable materials).
A limitation of this study is that it uses a single data-collection source, so it may suffer from common method bias [121].This phenomenon could be controlled in the future by multimethod studies, for example, by combining measurement instruments based on neuroscientific methods, such as eye-tracking.Social media are based on different forms of technology, and consumer behaviour can vary in relation to the channel used.Consequently, another future research line might apply the model to a sample of mobile social media users, to compare results.In addition, further research might explore moderator variables that differentiate user engagement (active users/posters versus passive users/lurkers).It seems increasingly important to explore the behaviour of "the silent majority" of holidaymakers, the lurkers that use social media to make their travel choices but do not share their experiences [122,123].This study focuses only on the most important factors of individual gratifications; other related constructs that may affect online consumer behaviour should also be examined.It would, thus, be interesting for further research to extend the present model to investigate the relationships among gratifications, knowledge-sharing intention, and collective stickiness intention.Another future research line would be to analyse the moderating effects of social media type used (travel-specific or non-travel-specific) on consumer interactive behaviour.Recent research [76,83,84] has revealed that, although motivations may be sufficient antecedents of behavioural intentions in tourism, perceived risks can diminish the effects of motivations in shaping the behavioural intentions of travellers.Therefore, as a future research line, we propose to extend our conceptual model to include the effects of perceived risks on consumer interactive behaviour.

Table 1 .
Social media and tourism: recent uses and gratifications theory (UGT) studies.

Table 2 .
Characteristics of the sample.

Table 3 .
Measurement of the variables.

Table 4 .
Confirmatory Factor Analysis results and measurement model psychometric properties.
Note: The diagonal represents the square root of the AVEs; the correlations between factors are represented below the diagonal.GRAT = gratification; LEI = leisure; REL = relaxation; BON = social bonding; STICK = stickiness.

Table 6 .
Discriminant validity of the research model.HTMT criterion.