Headings are titles or subtitles used in written documents to organize content and guide readers. They help break up text into manageable sections, making it easier to navigate and understand the material. Headings can vary in size and style, often indicating the hierarchy of information, with larger or bolder headings representing main topics and smaller ones for subtopics. In digital content, such as web pages or articles, headings are often formatted using HTML tags like H1, H2, and H3. This not only improves readability but also enhances search engine optimization (SEO), helping search engines like Google index the content more effectively.