What is the function of a conclusion sentence?

A conclusion sentence serves the important role of summarizing the main idea of a paragraph. It provides a clear and concise wrap-up that reinforces the key points made within the paragraph, allowing readers to understand the significance of what has been discussed. This sentence effectively brings closure to the information presented, ensuring that readers can grasp the overall message before moving on.

Introducing new ideas is not a function of a conclusion sentence; instead, that is generally done in the body of the text. Additionally, detailing the author’s background or providing lengthy explanations is neither appropriate for a conclusion sentence, which is intended to be succinct and focused on synthesis rather than expansion or authorial commentary.