In the context of social isolation caused by the Covid-19 pandemic, Internet use has increased significantly. The use by adolescents and young people has also intensified, with new forms of learning and digital sociability. Thinking about it and the vulnerabilities associated with the use of social medias, CEPIA developed the Guide Cidadania e Segurança Digital para Adolescentes e Jovens (Digital Citizenship and Security: a Guide for Adolescents and Youth). The Guide introduces the concept of digital citizenship, talks about various forms of online violence, provides tips on how to browse more safely and how the Life Skills by the World Health Organization can contribute to the safe and responsible use of the internet.