a) CONTEXTUALIZATION Adolescence is characterized by behavioural and neurobiological changes, marked by a constant discovery and the search for autonomy and independence by young people, with a decrease in the perception of risks, an increase in the relevance of social interaction and the construction of identity. This change is permanent and based on various contexts (family, school, peers, and neighbourhood) that interact with each other and are crucial in the development of the youngsters identity and maturity. However, these environments carry with them social risks that can decrease the youngsters resilience and increase the vulnerability to the practice of behaviours that are revealed later in addictions and dependencies. These addictive behaviours are increasingly expressed through: consumption of alcohol, tobacco, illegal substances, but also with regard to the digital world (use of internet, social networks, electronic games), for example. Access is increasingly easier and, therefore, consumption starts earlier and goes easily to the stage of addiction and dependence, which tends to promote situations of social exclusion, weak involvement, personal, social, school and academic failure, disintegration towards the community, few prospects for the future, etc., when taken to the extreme. b) SOCIAL PROBLEM AND NEEDS The existence of addictive behaviours and dependencies in young people, which obscures their ability to act and participate in society and, through this, promotes their social exclusion. We identified the need to: -Permanently update the competences, methodologies and methods of intervention of youth workers, in order to promote the continuous improvement of their practices and the development of new responses; -Bring together youth workers who deal with these young people on a daily basis, so that they can share guidelines, methodologies and strategies that allow them to renew the developed intervention and arrive at a (good) common practice to be implemented to solve the social problem; -To closely monitor the behavioural changes of young people, who are volatile and quickly change (even more so in the current global context), so that their needs and challenges are permanently heard and the intervention adapts to them, becoming effective. c) OBJECTIVES Main: Promote the social inclusion of young people and strengthen their capacity to act and participate in society, through the adoption of intervention strategies that prevent and eradicate Addictive Behaviours. Specifics: -To empower youth workers so that they are able to reinforce their work with young people, thanks to gains in understanding/intervention in Addictive Behaviours and through the identification of a common intervention practice; -Sensitize young people to the importance of adapting their behaviours, so that they do not deviate from additions and dependencies, which tend to promote situations of social exclusion, failure, defragmentation, etc; -Sensitize stakeholders and the community in general to the importance of promoting interventions that support the development of young people and eradicate Addictive Behaviours; -Encourage international dialogue on Addictive Behaviours, promoting the establishment of partnerships that contribute to the constant transformation and improvement of the youth sector. The challenge inherent to young people with addictive behaviors and addictions is great and, therefore, it was important to train and provide youth workers with knowledge, experiences, practices and new intervention methods and methodologies that would enable the implementation of effective and efficient actions to solve the social problem. In short, we promoted the Seminar so that youth workers could share their work, the methods they use in the prioritized methodologies and thus develop new knowledge and competences that allowed for an improvement in their actions with young people at risk or already in a situation of exclusion. With a broad focus on prevention, our ambition is that youth workers become real agents of change in the lives of young people, empowering and raising their awareness about addictive behaviors and addictions and the implications in their lives and in their own full development. In this way, we have contributed to the existence of conscious, critical, informed, and capable young people who are able to answer for themselves, to identify deviant paths, and to embark on positive and healthy paths. These, after the intervention, were also means of influencing their peers and contributed to the changes taking place on a large scale.