Adolescents need support from the individuals and institutions around them to promote their immediate well-being and their longer-term positive development. At the family level, parents and other care takers have a critical role to play in creating a safe and nurturing environment for growth and development. At the community level, individuals in regular contact with adolescents can help to identify warning signs such as anxiety, sadness, and substance use and facilitate access to counselling and health services. Schools can build skills and confidence and can also play a key role in ensuring that adolescents receive health and life skills education, including comprehensive sexuality education, and in encouraging physical activity and good nutrition. At the societal level, well-designed laws, policies and well-resourced programmes can create opportunities for education and employment and ensure safety and security in public places for a supportive local environment. Finally, addressing harmful and unequal gender norms and relationships and other types of discrimination is fundamental to well-being.