A heading element implies all the font changes, paragraph breaks before and after, and any white space necessary to render the heading. The heading elements are H1, H2, H3, H4, H5, and H6 with H1 being the highest (or most important) level and H6 the least. For example:
Heading 1
Heading 2
Heading 3
Heading 4
Heading 5
Heading 6
Headings Are Important
Search engines use the headings to index the structure and content of your web pages.
Users often skim a page by its headings. It is important to use headings to show the document structure.
<h1>
headings should be used for main headings, followed by <h2>
headings, then the less important <h3>
, and so on.