Single H1 heading
Also known as H1 · main heading · primary heading
The <h1> is the top-level heading that names the page's main topic; using exactly one gives the document a clear, unambiguous title for users, crawlers, and assistive technology.
What it is
Headings <h1> through <h6> define the outline of a page. The <h1> sits at the top of that hierarchy and should state what the whole page is about, with subsequent sections nested under <h2> and <h3>.
Why it matters
A clear single H1 reinforces the page's topic and helps crawlers and AI engines parse the document outline to extract the right answer. A logical heading structure also makes content easier to chunk and quote, which improves how passages are pulled into AI-generated answers.
How to verify
Use browser DevTools or run document.querySelectorAll('h1') in the console to count H1 elements, expecting exactly one. Accessibility tools like the WAVE or Lighthouse heading-order checks also flag missing, empty, or duplicate H1s.
How to fix
Keep one descriptive <h1> per page that mirrors the page topic and is close to the title tag, then demote any extra H1s to <h2> or <h3>. Maintain a logical, non-skipping heading order and avoid using headings purely for visual sizing.
Related terms
- Title tagThe <title> element in a page's <head> defines its canonical name, shown as the clickable headline in search results and as the browser tab label.
- Meta descriptionA <meta name="description"> tag that summarizes the page in one to two sentences and is often used as the snippet under the title in search results.
- Question-Answer / FAQ StructureOrganizing key pages around the real questions users ask, each followed by a clear answer, so both readers and answer engines can locate responses quickly.
- Structured Data ValidationConfirming that a page's JSON-LD parses cleanly and meets schema.org and Google requirements, with no blocking errors or missing required fields. Valid markup is a prerequisite for rich results and reliable entity extraction.
Official references
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Put this into practice.
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