A paragraph is a distinct section of written text that focuses on a single idea or topic. It is typically made up of multiple sentences that are logically connected and flow smoothly together. The first sentence of a paragraph, known as the topic sentence, introduces the main idea, while subsequent sentences provide supporting details, examples, or explanations. A paragraph usually begins with an indent and ends with a blank line, visually separating it from other paragraphs in a text. This structure helps readers understand and follow the writer's train of thought, making the text easier to comprehend.