A paragraph is a distinct section of writing that typically consists of several sentences focused on a single idea or theme. It helps organize thoughts and makes the text easier to read and understand. Each paragraph usually begins with a topic sentence that introduces the main idea, followed by supporting sentences that elaborate on it. In written works, paragraphs can vary in length but generally contain three to eight sentences. They are essential in various forms of writing, including essays, articles, and reports, as they guide the reader through the author's arguments or narratives. Proper paragraph structure enhances clarity and coherence in communication.