What is the purpose of an introduction in an essay?

The purpose of an introduction in an essay is to introduce the main topic and outline what will be discussed throughout the piece. This section sets the stage for the reader by providing context and presenting the thesis statement, which summarizes the essay's central argument or point. It serves to capture the reader's interest and gives them a preview of what to expect, establishing a clear direction for the essay. By clearly outlining the main points that will be explored, the introduction helps guide the reader's understanding and prepares them for the information that will follow.