Quick Tip: WCAG Requirements for Headings
WCAG requires that headings (<h1>-<h6>) accurately describe the content that follows the heading, that text that functions visually as a heading be marked up as a heading, and that the heading structure aligns with the page hierarchy. In general, a page should have a single <h1> that describes the main content, <h2> for main sections, <h3> for sub-sections etc. If there are headings that precede the main page heading, these should be a lower level, usually <h2>.
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