Content Moderation Across Social Media Platforms examines the challenges, methods, and practices of moderating digital content, offering critical insights into platform-specific moderation strategies and their societal implications.This book provides readers with advanced digital research methods to study content moderation, including analysis of moderation traces, performance metrics, and user experience simulations. It explores moderation histories and practices across platforms such as X/Twitter, YouTube, Facebook, Instagram, TikTok, Telegram, and AI chatbots such as ChatGPT and Gemini. The book highlights problematic areas, such as uneven policy enforcement, data gaps, illegal trade, and election misinformation, while proposing a sustainable moderation philosophy for the public agenda.Designed for researchers, educators, policymakers, and students in digital media studies, this book is an essential resource for those seeking to understand and address the complexities of content moderation in the digital age.