Lesson 2: HTML Headings What Are HTML Headings? Headings are used to define the structure of a webpage. They range from <h1> (most important) to <h6> (least important). Syntax: <h1>This is a heading</h1> <h2>This is a sub-heading</h2> <h3>This is a smaller heading</h3> <!-- and so on.. --> Next Lesson: HTML Text