Abstract The daily lives of children and adolescents in 2024 are heavily influenced by social media and smartphones, which is unprecedented in previous generations. While this technology offers undoubted benefits, there is strong evidence on the negative effects of social and cognitive development of infants and primary school aged children, and mental health impacts in adolescents including depression, anxiety, sleep disruption, addictive behaviours and self-harm. Internet companies are financially incentivised to maximise screen time of users to generate advertising revenue, and more time spent by young people on these devices in a largely unregulated online domain increases risk of consequences like bullying and harassment, body dysmorphia, gambling addiction, porn addiction, sexual predation and suicide. Comprehensive solutions are urgently needed to regulate the activities of social media and tech companies and support young people to protect themselves from serious harms. Governments have been slow to introduce policies such as smartphone bans or enhanced privacy laws, perhaps because they are perceived as unpopular infringements on the rights of adult users and/or due to a potential detrimental effect on commercial interests. Guidance can be disseminated to young people, schools, families and institutions on how to reduce screen time and smartphone addiction, and improve coping and self-regulation to mitigate these risks. Information campaigns with positive health messages in this area, to compete with the advertising dominance of social media companies, are another opportunity to improve behaviours and reduce adverse health effects. The objectives of this round table workshop are to share examples of strategies, guidance and policies from across Europe, and discuss with the audience how the public health community can collaborate to tackle this problem. Members of the EUPHA Child and Adolescent Public Health (CAPH) section will outline the latest available evidence on the negative impacts of social media and screens, present examples of innovative public health responses and strategies to protect children, and engage conference participants for their input and discussion. Five panellists will present. First, John will start with a quiz of the audience which will include presentation of current data and trends relating to social media and smartphone usage. The second presentation by Cecilia will highlight in detail evidence of both benefits and adverse effects of these technologies in the lives of young people. The third speaker Karin will discuss examples of effective policies to reduce this impact, with a focus on the role of schools. The fourth speaker Jean will give further examples of public health actions, and share recommendations directly from children and young people. The fifth panellist Silja will re-quiz the audience, to gauge the reaction and support of solutions that were covered, and this will lead into the interactive discussion. Key messages • Popularity of smartphones and social media has increased dramatically in recent years, particularly among minors, with significant impacts on mental and physical health. • Public health solutions are urgently needed, and this workshop will share examples of effective innovative responses in European contexts, followed by an interactive audience discussion.