This chapter introduces TikTok’s rapid ascent from a Chinese start-up to a global cultural force with over a billion users. It examines the app’s unique blend of entertainment, algorithmic personalization, and community features that distinguish it from Western competitors like YouTube and Instagram. Special attention is given to TikTok’s ownership structure and its fraught position between China and the United States. The chapter also compares TikTok to its domestic counterpart, Douyin, highlighting how different regulatory and ideological environments shape content. Ultimately, it frames TikTok not simply as a platform for leisure but as a contested political actor situated at the intersection of culture, technology, and geopolitics.