How do titles and subtles help readers?

Titles give readers an idea about the main topic or theme of a piece of writing, helping them decide if they want to read further. Subtitles can provide additional context, focus, or details about the content of a text, making it easier for readers to understand the purpose or scope of the material. Together, titles and subtitles play a crucial role in guiding readers and setting expectations for what they can expect from the content.