In this section, we'll see how to place headers and horizontal rules into the document. Headers Most documents of any reasonable length can be broken down into smaller sections, and most readers are accustomed to seeing headers that label each of these subsections. HTML provides six nested levels of headings. These headings are contained within the H1, H2, H3, H4, H5, and H6 elements.
Headings exist outside of paragraphs, tables, and other such larger text structures.
It is considered good form to properly nest the headings in your document, beginning with the level 1 heading. In other words, all the level 2 headings are tucked beneath a level 1 heading, etc. They are used to provide visual separation between sections of your document. You have now covered all the HTML tags that help you structure your document. Make an HTML version of a syllabus for a course using what you have learned so far in these tutorials.