Key Takeaways
- Use exactly one H1 per page — it should be the primary keyword or a close variant, describing what the entire page is about
- Heading hierarchy must not skip levels: H1 → H2 → H3 only; jumping from H1 to H3 without an H2 signals poor content structure to crawlers and creates accessibility issues for screen reader users
- Include the target keyword in the H1 and at least one H2 — but don't force it into every heading; headings with natural keyword context rank better than keyword-stuffed ones
- H2 tags are the most SEO-valuable after H1 — they define the major subtopics of the page, which Google may extract for featured snippets
- Multiple H1 tags on a page (a common CMS bug) confuse Google about the page's primary topic — audit your entire site for H1 duplicates
H1 — The Page's Primary Topic Signal
The H1 is the most important heading tag. It tells Google what the page is fundamentally about. Best practices:
One H1 per page. This is the strongest signal. Multiple H1s create ambiguity — Google has to guess the primary topic from competing signals.
H1 content. The H1 should contain the primary keyword or a natural variant. "How to Check Broken Links on Your Website" is a strong H1; "Page About Checking Links on Websites and Finding Broken URLs" keyword-stuffs and looks unnatural.
H1 ≠ title tag. The H1 and title tag can (and often should) differ slightly. The title tag is optimised for SERP display (60 chars max); the H1 can be more descriptive.
Common H1 bugs:
- CMS themes that render the site name as an H1 on every page
- Blog index pages with one H1 per article card (multiple H1s in the DOM)
- Pages where the logo alt text or nav title is wrapped in an H1
H2 Tags — Major Section Structure
H2 tags define the major subtopics of the page. They're valuable for:
Keyword coverage. H2 headings that naturally contain related keywords (LSI keywords, question variants) help Google understand the breadth of the page's topic coverage.
Featured snippet triggers. When H2 text matches a question query and is followed by a concise answer, Google often extracts it as a featured snippet paragraph.
Readability signals. Pages with a clear H2 structure have lower bounce rates than wall-of-text pages — which correlates with ranking stability.
H2 usage guidelines:
- Use for major content sections (equivalent to chapters)
- Include 2–6 H2s on a typical 1000-word page (more sections = more H2s)
- Don't use H2 just to make text bigger — use CSS for visual formatting
H3–H6 — Subsection Structure
H3 tags are subsections of H2 sections. H4–H6 are rarely needed except for very deep technical content.
Correct hierarchy:
H1: Main topic
H2: Major section 1
H3: Subsection 1a
H3: Subsection 1b
H2: Major section 2
H3: Subsection 2aIncorrect (hierarchy skip):
H1: Main topic
H3: Section (skipped H2) ← Google and screen readers see this as broken structureThe heading skip check is one of the 22 SEO checks in the SEO Analyzer. A page with H1 → H3 without an intervening H2 fails the heading hierarchy check.
Keyword Placement in Headings
Where to place keywords in headings:
- H1: Primary keyword / close variant — always
- First or second H2: Primary keyword or a semantically related term — naturally
- Remaining H2s: Related terms, question variants, subtopics — naturally
- H3s: No specific keyword requirement — be descriptive of the subsection content
What not to do:
- Putting the exact keyword phrase in every H2 ("broken link checker section 1", "broken link checker section 2")
- Starting every heading with the same keyword ("SEO: H1 tags", "SEO: H2 tags", "SEO: H3 tags")
- Using headings only for keywords, without them serving as genuine navigation markers
Common Heading Structure Mistakes
| Mistake | Impact | Fix |
|---|---|---|
| Multiple H1s | Confused primary topic signal | Remove extra H1s; use H2 for section titles |
| Missing H1 | No primary topic signal | Add exactly one H1 with primary keyword |
| Heading skip (H1→H3) | Broken structure signal, accessibility fail | Insert H2 between H1 and H3 |
| Keyword-stuffed headings | Looks manipulative; may trigger manual review | Write natural, descriptive headings |
| Using headings for visual formatting only | Heading hierarchy pollution | Use CSS classes for styling; use headings for structure |
| No headings at all (H2+) | Thin content signal; no snippet opportunity | Add H2 section headings to organise content |
Auditing Heading Structure at Scale
For a single page: View Source → Ctrl+F for <h to scan all heading tags in order. This shows the raw heading sequence and immediately surfaces any skips or multiple H1s.
For the entire site: The SEO Analyzer crawls every page and flags:
- H1_MISSING — page has no H1 tag at all
- H1_MULTIPLE — page has more than one H1 tag
- HEADING_SKIP — heading hierarchy skips a level (e.g. H1 directly to H3)
Export the results filtered by the "headings" tab to see all pages with heading issues in one view. A site with 200 pages can have dozens of heading errors introduced by CMS templates, page builders, or imported content — scanning manually is not practical.
Audit Your Site's Heading Structure
Free, no signup. The SEO Analyzer crawls every page and flags missing H1s, multiple H1s, and heading hierarchy skips — so you can fix structural issues across the entire site, not just the pages you manually check.
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