What is the role of a topic sentence in a paragraph?

The role of a topic sentence in a paragraph is to convey the main point of that paragraph. It serves as a guide for the reader, indicating what the paragraph will discuss and summarizing the central idea or argument that will be expanded upon in the following sentences. A well-crafted topic sentence sets the tone and context for the details provided, ensuring that the reader understands the focus of the paragraph right from the beginning.

In contrast to concluding or summarizing statements, which would typically appear at the end of a paragraph or an essay to wrap up the discussion, the topic sentence lays the foundation for what is to come. The topic sentence also differs from listing examples indiscriminately, as it is more about presenting a clear main idea rather than merely enumerating details. Lastly, while a topic sentence may hint at themes present in an entire essay, its primary function is centered within the specific paragraph, making it distinct from a summary of the entire work.