Artificial Intelligence (AI) has become a driving force in shaping the structure, functionality, and user experience of social media platforms. From personalized content recommendations and targeted advertising to automated moderation and deep fake content creation, AI influences nearly every aspect of how individuals engage online. This paper explores the multifaceted role of AI in social media, focusing on its impact on user behavior, content visibility, privacy concerns, and information integrity. While AI enhances user engagement and platform efficiency, it also raises ethical and societal concerns related to bias, misinformation, algorithmic transparency, and data privacy. Through a critical analysis of current technologies, case studies, and platform policies, this research aims to assess both the benefits and drawbacks of AI’s integration into social media. The findings offer insight into how AI is reshaping digital communication and call for balanced approaches that prioritize innovation while addressing ethical and regulatory challenges.