This investigation is based on the trilogy of Youth generations, technologies and tourism, and its objective is to carry out a theoretical reflection on the theme, bringing together scientific information from different countries, which allows for a characterization of the new trends in tourism that is increasingly manifested digitally, requiring a close intrinsic relationship with technologies and implying new tourist experiences on the part of individuals, namely the youth generation. The methodology used is a literature review covering themes on the evolution of mass tourism toward a New Tourism or Post-Tourism, the use and impact of new technologies in the context of the offer of tourist experiences, in the research and publication of information in social media by new tourists, with a focus on the Youth generations. A characterization of the generations of Millennials and Post-Millennials is made, tracing their respective profiles, taking into account their way of acting in social media in the current tourist context. The User-Generated Content (UGC) is highlighted, whose information is related to the tourism experiences lived by young people and shared by them on social networks, information, and communication channels with growing impact and alternatives to those that disseminate paid information and published on the net. In the final considerations, some of the most important conclusions of the research are taken up again. Some recommendations are reinforced in these matters collected in the research and which can serve as a reflection and alert so that the stakeholders involved in this new tourism can obtain better performance and results.