In recent years, European youth policy has recognized the importance of encouraging the participation of young people in the democratic life of Europe. In this direction, the international project “Research-based Analysis of Erasmus Plus: Youth in Action” (RAY) analyzes the experiences of mobility, participation and citizenship of young people. This article presents the main results of RAY-LTE, a research Programme included in the wider international RAY project, with regard to the impact of the mobility training experiences promoted by Erasmus+/ YiA on the attitudes, knowledge, skills and values acquired by the beneficiaries in relation to citizenship and participation. The results of the research show how the effects produced by the mobility experiences favor a commitment to strongly supportive adhesion practices in areas such as volunteering, civil commitment and associations.