## 6 Conclusions  
Throughout this investigation, the primary objective was to understand the influence of the UGC present on the TikTok social network on the Portuguese consumer's intention to purchase tourist products, considering the study of five variables antecedent to purchase intention: the need for information, credibility of information, usefulness of information, perceived risk and social influence.  
It was found that UGC influences purchase intention, especially through the variable social influence; that is, whoever communicates UGC about the tourist product significantly influences their intention to buy a certain tourist product. The positive relationship between the usefulness of information and purchase intention was also proven; that is, the consumers' consideration of UGC as useful influences their intention to purchase a certain tourist product. The proposed model also supported the relationship between information credibility and information usefulness and between social influence and purchase intention. In contrast, the influence between the perceived risk and purchase intention variables was not supported.  
Additionally, results were compared between the Millennial sample and the Centennial sample, which presented as the main discrepancy in results the relationship between the need for information and the usefulness of information, which results from the Millennial sample did not prove, in opposition to the Centennials.  
In terms of the limitations of this research, we can indicate the method of collecting responses in the questionnaire survey. The questionnaire was carried out online and shared through the social networks Facebook, Instagram, and TikTok. As it is a non-probability sampling method--convenience sampling--the sample may not fully represent the population. Due to this constraint, the study must be regarded as a preliminary investigation in order to inform a more statistically significant study. This will enable the drawing of tenable conclusions that will aid in the creation of a more robust study.  
Concerning future work and following this investigation, we intend to investigate more factors that positively or negatively influence purchase intention, with the integration of a moderator associated with the type of tourism practised, because despite being applicable to any type of tourism, from cultural to nautical, certain factors may have different influences on purchase intention. Additionally, the aim is to evaluate the influence of user-generated content on the intention to purchase another type of product, namely a product with characteristics different from those of a tourist. Alternatively, investigating the main motivations for creating and sharing tourist UGC on the social network TikTok could be interesting.  
Conceptualization, E.C.R.; methodology, C.M.Q.R.; software, C.M.Q.R. and E.C.R.; validation, C.M.Q.R.; formal analysis, E.C.R.; investigation, E.C.R.; resources, E.C.R.; writing--original draft preparation, E.C.R.; writing--review and editing, C.M.Q.R.; supervision, C.M.Q.R; project administration, C.M.Q.R.; funding acquisition, C.M.Q.R. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research was funded by National Funds provided by FCT--Foundation for Science and Technology, grant number UID/04020/2020 (CinTurs--Research Center for Tourism, Sustainability and Well-being).  
**Data Availability Statement:** The original contributions presented in this study are included in the article. Further inquiries can be directed to the corresponding author.  
**Conflicts of Interest:** The authors reported no potential conflict of interest.