A chapter is a distinct section of a book or written work that typically focuses on a specific theme or event. Chapters help organize the content, making it easier for readers to follow the narrative or argument. Each chapter usually has a title or number, indicating its order in the overall structure of the work. In fiction, chapters often mark shifts in time, perspective, or location, enhancing the storytelling experience. In non-fiction, chapters can break down complex topics into manageable parts, allowing readers to absorb information more effectively. Overall, chapters serve as essential building blocks in both literature and academic writing.