H1 Tag
The primary HTML heading element on a page, signalling to search engines and users what the main topic is.
Definition
The H1 tag is the highest-level heading in HTML's six-level hierarchy (H1–H6). It acts as the main title of your page content — distinct from the <title> tag which appears in SERPs. From an SEO perspective, the H1 is a strong on-page signal: Googlebot reads it early in the page crawl to understand the primary topic, and it contributes meaningfully to topical relevance scores.
Most SEO guidelines recommend using exactly one H1 per page, though Google has stated multiple H1s are acceptable if the page structure warrants it. The H1 should include the page's primary keyword, ideally near the beginning of the text, and should closely align with the title tag to maintain topical consistency. Mismatches between the title tag and H1 can confuse search engines about the page's primary focus.
For accessibility and usability, the H1 should be visually prominent and clearly communicate the page's value to a reader who lands from a search result. A well-structured heading hierarchy (H1 → H2 → H3) also helps screen readers navigate content, contributing to overall E-E-A-T signals.