How Heading Structure (H1–H6) Affects SEO and Readability
Headings organise your content for readers, screen readers and search engines. Here's how to structure H1 to H6 properly, with an example outline.
Key takeaways
- Headings help readers scan and help Google understand the sections of your page.
- Use one clear H1 that states the page topic.
- Nest headings logically: H2 for main sections, H3 for sub-points within them.
- Make headings descriptive; questions people search for often make good H2s.
Headings (<h1> to <h6>) give your content structure. They help people scan the page, help screen reader users navigate, and help search engines understand what each section covers.
The basic rules
- One H1 that states the main topic of the page (usually the visible page title)
- H2s for the main sections
- H3s for sub-points inside an H2 section; H4–H6 are rarely needed
- Don’t skip levels for styling reasons (an H4 straight after an H2)
- Use CSS for styling, not heading tags. Don’t make text an H3 just because you want it bigger.
Google has said multiple H1s won’t cause problems, but one clear H1 is still the cleanest approach for users and accessibility.
An example outline
H1: How to Run a Meta Ads Audit
H2: What a Meta ads audit covers
H2: Step 1: Check tracking
H3: Pixel and Conversions API
H3: Event match quality
H2: Step 2: Review account structure
H2: Step 3: Analyse creative performance
H2: Common problems we find
H2: Frequently asked questions
Someone skimming only the headings should understand what the page covers and find the part they need.
Writing good headings
- Be descriptive: “Step 1: Check tracking” beats “Getting started”
- Use the language people search with: questions from “People also ask” often make excellent H2s
- Keep them short: usually under 70 characters
- Front-load the key words
- Avoid stuffing the same keyword into every heading
Why headings matter for AI search too
AI search systems often pull specific passages to answer questions. Clear headings followed by direct answers make your content easier to extract and cite. See how to get your content cited by ChatGPT and AI Overviews.
Common mistakes
- No H1, or the logo set as the H1 on every page
- The same H1 on many pages
- Headings used for styling sidebar text or footers
- Long paragraphs with no subheadings
- Headings that don’t match the content beneath them
How to check
Browser extensions and crawlers can list every heading on a page or across the site. Look for missing or duplicate H1s and broken hierarchy.
Headings are part of the on-page SEO checklist.