What is a Paragraph?

A paragraph is a group of sentences that convey an idea. Each sentence works together as part of a unit to create an overall thought or impression. A paragraph is the smallest unit or cluster of sentences in which one idea  can be developed adequately. Paragraphs can stand alone or function as part of an essay, but each paragraph covers only one main idea.

The most important sentence in your paragraph is the topic sentence, which clearly states the subject of the whole paragraph. The topic sentence is usually the first sentence of the paragraph because it gives an overview of the sentences to follow. The supporting sentences after the topic sentence help to develop the main idea. These sentences give specific details related to the topic sentence. A final or concluding sentence often restates or summarizes the main idea of the topic sentence.