Example 3 - Use of Heading styles to help visually communicate document structure. For purposes of accessibility, the Heading 1 <h1> should only be used once and only for the title of the current document.
Heading 1 - Meant for Page Title Only
Heading 2 - Meant for Major Headings
Heading 3 - Meant for Sub-headings
Heading 4 - Meant for Sub-Sub-headings
Heading 5 - Meant for Sub-Sub-Sub-headings
Heading 6 - Meant for Sub-Sub-Sub-Sub-headings