The purpose of a paragraph is to express a speaker’s thoughts on a particular point in a clear way that is unique and specific to that paragraph. In other words, paragraphs shouldn’t be mixing thoughts or ideas. When a new idea is introduced, generally, a writer will introduce a new paragraph. The purpose of a paragraph is to express a speaker’s thoughts on a particular point in a clear way that is unique and specific to that paragraph. In other words, paragraphs shouldn’t be mixing thoughts or ideas. When a new idea is introduced, generally, a writer will introduce a new paragraph