You will never look at social media the same way again.  Social media are an integral part of contemporary society. From news, warfare, politics, advertising, consumption, entertainment, friendships, labour, and economy to friendships, leisure, language, and everyday life, they have changed the way we communicate, use information and understand the world.  Social media shape and are shaped by contemporary society. In order to understand contemporary society we have to ask critical questions about social media. This book is the ultimate guide for digging deeper into issues of ownership, power, class, and (in)justice.  This book equips you with a critical understanding of the complexities and contradictions at the heart of social media’s relationship with society.   The Fourth Edition contains new chapters and has updated and revised versions of other chapters: *  The book includes a new chapter on TikTok in the context of global capitalism and the geopolitical conflict between China