What is the purpose of a thesis statement?

A thesis statement serves a critical role in an essay by clearly expressing the main argument or point. It acts as a roadmap for the reader, indicating what the writer will discuss and the stance they will take on the subject matter. This clarity helps guide the reader through the various points and evidence that will be presented throughout the essay. A well-crafted thesis not only reflects the central idea but also establishes the framework within which the argument will unfold, making it easier for readers to understand the direction and purpose of the writing.