## 5 Discussion
In line with the IACM model of [PERSON] and [PERSON] [69], the positive influence of information credibility on information usefulness (H\({}_{4}\)) was validated, which in practice means that when information is considered credible, that is, when the Tourist UGC present on the TikTok social network is considered by the consumer to be credible, and this same consumer considers this information to be useful in their purchasing decision process. The fifth research hypothesis (H\({}_{5}\)), regarding the positive influence of information usefulness on purchase intention, was supported, similar to the previous hypotheses, in line with the research by [PERSON] and [PERSON] [60] and [PERSON] and [PERSON] [81]. In other words, when a user considers a tourist UGC about a certain tourist product viewed on TikTok as useful, they will consider it in their intention to purchase that tourist product. According to [PERSON] and [PERSON] [69] (p. 50), users react to useful information. These results are, therefore, consistent with the previous literature, namely with the study by [PERSON] and [PERSON] [48], which found a significant influence relationship between digital social influence, presence on social platforms, and purchase intention. The influence of UGC information on purchase intention has already been proven (for example, [PERSON] and [PERSON] [69]; [PERSON] and [PERSON] [82]); however, this study sought to verify this relationship with application to the product tourism on the social network TikTok which, at the end of the entire data collection and analysis process, was possible. The findings of this study underscore the significant influence of User Generated Content (UGC) on the purchasing intentions of both the Millennial and Centennial generations within the tourism sector. Notably, the Centennials displayed a stronger inclination towards purchasing event tickets, indicating that this generation is particularly responsive to social media content that highlights experiences and activities. Conversely, while Millennials also engage with UGC, their purchasing intentions lean more towards hotel accommodations. This distinction suggests that tourism marketers should tailor their strategies to target the specific preferences of each generation. For Centennials, marketing efforts can focus on promoting experiences, such as events and activities, through engaging content on platforms like TikTok. In contrast, strategies aimed at Millennials might benefit from emphasising the value and comfort of accommodation, as their purchasing decisions appear to be more influenced by practical considerations. Overall, understanding these generational differences allows tourism businesses to create more effective marketing campaigns that resonate with their target audiences. From a theoretical perspective, this study contributes to the existing literature on consumer behaviour by highlighting the role of UGC in shaping purchase intentions across different generations. The successful application of the eXtended Information Acceptance Model (XIAM) in this context demonstrates its utility in understanding the dynamics of social influence, perceived usefulness, and purchasing intentions. Methodologically, the use of Structural Equation Modelling (SEM) provides a robust framework for assessing the relationships between latent variables, offering insights into the underlying mechanisms that drive consumer behaviour. The validation of both internal consistency and convergent validity across generational samples reinforces the reliability of the findings. However, the reliance on a non-random sample poses limitations, suggesting that while the results are indicative, they should be interpreted as preliminary. Future research should aim to utilise random sampling methods to enhance the generalisability of the findings and further explore the nuances of how UGC influences purchasing behaviour in the tourism industry across different demographic groups.