This literature review examines the multifaceted effects of social media on the mental health of young people. It explores how social media platforms facilitate youth activism and shape individual identities, referencing campaigns like 'Me Too' and 'Occupy the Wall Street.' The review acknowledges the positive aspects of social media, such as its role in promoting activism and facilitating discussions on important social issues. However, it also delves into the negative impacts, including the creation of negative body image perceptions due to unrealistic standards portrayed by celebrities, and the prevalence of cyberbullying. The review highlights how anonymity on social media enables negativity and can lead to anxiety and feelings of rejection among youth, ultimately emphasizing the complex and often contradictory role of social media in the lives of young people.