Heading tags (not to be confused with the HTML tag or HTTP
headers) are used to present structure on the page to users. There are
six sizes of heading tags, beginning with , the most important, and
ending with , the least important (1).
Since heading tags typically make text contained in them larger than
normal text on the page, this is a visual cue to users that this text
is important and could help them understand something about
the type of content underneath the heading text. Multiple heading
sizes used in order create a hierarchical structure for your content,
making it easier for users to navigate through your document.