The purpose of an essay's conclusion is to:

The conclusion of an essay serves a critical role in reinforcing the main arguments and bringing closure to the discussion. By restating the thesis and summarizing the main points, the conclusion helps to remind the reader of the key insights and perspectives presented throughout the essay. This recapitulation not only aids in reinforcing the writer's position but also helps to ensure that the reader leaves with a clear understanding of the essay's core message.

Additionally, summarizing the main points allows for a cohesive wrap-up of the discussion, providing a sense of completeness and resolution. In effective writing, the conclusion is the final opportunity for the writer to leave a lasting impression, emphasizing the significance of their arguments without introducing unrelated concepts or questions that could distract from the central message.