This book grasps the duality between opportunities and risks which arise from children's and adolescents' social media use. It investigates the following main themes, from a multidisciplinary perspective: identity, privacy, risks and empowerment. Social media have become an integral part of young people's lives. While social media offer adolescents opportunities for identity and relational development, adolescents might also be confronted with some threats. The first part of this book deals with how young people use social media to express their developing identity. The second part revolves around the disclosure of personal information on social network sites, and concentrates on the tension between online self-disclosure and privacy. The final part deepens specific online risks young people are confronted with and suggests solutions by describing how children and adolescents can be empowered to cope with online risks. By emphasizing these different, but intertwined topics, this book provides a unique overview of research resulting from different academic disciplines such as Communication Studies, Education, Psychology and Law. The outstanding researchers that contribute to the different chapters apply relevant theories, report on topical research, discuss practical solutions and reveal important emerging issues that could lead future research agendas.