Heading Structure for SEO: How H1–H6 Tags Affect Rankings
The H1 Rule
Every page should have exactly one H1 — the main topic of the page. The H1 should contain the primary keyword. Multiple H1s were once a common blocker for SEO; modern HTML5 technically allows multiple H1s per section but Google still treats the first H1 as the primary heading signal.
H2–H6 Hierarchy
Think of headings as a document outline: H2s are major sections, H3s are subsections of H2s. Never skip levels (H1 → H3 without H2). Headings should describe what follows — not just be keyword containers. Each H2/H3 should naturally include secondary and related keywords.
Common Heading Mistakes
Using headings for visual styling only (bold large text) rather than semantic structure. Hiding keywords in headings via CSS (display:none) — this is a cloaking violation. Making headings too long (> 60 characters) — lose impact and semantic clarity. Missing keywords in headings entirely — headings are strong on-page signals.
Frequently Asked Questions
Analyze your heading structure
Use the Heading Analyzer to check H1-H6 structure across any URL.
Open Heading Analyzer