What does a "thesis statement" provide in an essay?

A thesis statement offers a concise summary of the main point or claim of an essay, essentially serving as the foundation for the argument or analysis that follows. It encapsulates the central idea in a clear and specific manner, guiding the reader on what to expect in the essay. A well-crafted thesis statement not only presents the topic but also conveys the writer's stance or perspective, which helps to unify the content and gives direction to the argument. This is crucial for effective communication in writing, as it helps maintain focus and provides a roadmap for both the writer and the reader throughout the essay.