Resumen: This paper explores differences among Generations X, Y, and Z in customer engagement behaviours. Specifically, it analyses differences in customer behaviours in social tourism websites and the effects of self-efficacy and satisfaction on these behaviours. On the basis of an empirical study with a sample of 346 social tourism websites users, the results show that, in Generation X, self-efficacy exerts a higher effect on word of mouth than in the other generations. In Generation Y, satisfaction influences information searches and hotel bookings more than for the others. Generation Z is more prone to give referrals than are the other two generations. Idioma: Inglés DOI: 10.1002/jtr.2327 Año: 2020 Publicado en: INTERNATIONAL JOURNAL OF TOURISM RESEARCH 22, 2 (2020), 182-191 ISSN: 1099-2340 Factor impacto JCR: 3.791 (2020) Categ. JCR: HOSPITALITY, LEISURE, SPORT & TOURISM rank: 27 / 58 = 0.466 (2020) - Q2 - T2 Factor impacto SCIMAGO: 1.155 - Geography, Planning and Development (Q1) - Transportation (Q1) - Tourism, Leisure and Hospitality Management (Q1) - Nature and Landscape Conservation (Q1)