H1 Tag

The H1 is the primary heading element on a web page, defined by the HTML <h1> tag. It is typically the visible page title that the reader sees at the top of the content area — distinct from the Title Tag, which sits in the document head and controls the browser tab and SERP headline.

The H1 is one of the strongest on-page topical signals because it expresses what the page is about in the same place the reader's eye lands first. Search engines weight it heavily for relevance scoring. Google has confirmed that having an H1 is helpful, that multiple H1s are not penalised (the HTML5 spec actually permits multiple H1s in sectioning elements), but that a single, clear, descriptive H1 remains best practice.

Practical guidance: include the primary target keyword in the H1, but write for the reader first. Avoid duplicating the title tag verbatim — the two elements serve different audiences (search snippet vs. on-page reader) and should differ slightly. Keep the H1 to a single line where possible, around 50–70 characters.

Use H2s and H3s to structure the rest of the content hierarchically. Search engines parse heading hierarchy to understand sub-topic coverage, which feeds Topical Authority signals. A well-structured article on "domain authority" might have an H1 of "Domain Authority Explained" with H2s for "How DA Is Calculated," "DA vs DR vs Authority Score," "How to Increase Your Domain Authority," and so on.

Common mistakes: missing H1 entirely (some CMS templates render the page title as a styled <div>); multiple competing H1s with conflicting topics; H1 stuffed with multiple keyword variations ("Best SEO Tool, Top SEO Software, Cheap SEO Service 2025"); H1 placed below an H2 in DOM order. Audit the rendered HTML, not just the visual layout — CSS can hide structural problems.

For e-commerce category pages, the H1 should describe the category cleanly: "Mechanical Keyboards" rather than "Mechanical Keyboards | Buy Online | Free Shipping." Promotional language belongs in the title tag and meta description, not the H1.