Hn Tags (H1 / H2 / H3): Definition and Key Concepts
What are H1, H2 and H3 tags in SEO?
The H1, H2, and H3 tags (called Hn tags) are used to structure a web page with a clear hierarchy.
The H1 introduces the main topic, H2s divide the page into main sections, and H3s detail a subsection of an H2.
A well-designed structure helps users scan the content and allows Google to better understand the topic and subtopics of the page.
Why are Hn tags important?
- Google understanding: titles indicate main and secondary topics, making the page easier to interpret.
- Readability: users rarely read everything; they scan. H2/H3 help them quickly find information.
- Content structure: a good hierarchy makes the page clearer, more pleasant, and “cleaner” (especially on mobile).
- Semantic consistency: headings structure the content logic, reducing the risk of “confused text”.
How to use H1, H2 and H3 correctly (simple rules)?
H1 (main topic)
- Only 1 H1 per page (the page = 1 main topic)
- The main keyword can appear naturally, without repetition
- The H1 must be clear and “human” (not a list of keywords)
H2 (main sections)
- Use H2s to answer the main questions of the user
- Each H2 should provide a useful block of information (not a “empty” title)
H3 (subsections)
- Use H3 only when an H2 needs further detail
- If you only have one sub-point, use a simple paragraph (no need for H3)
H4 and beyond
- Reserved for very long or technical content (details, sub-steps)
Structure templates (to copy and paste)?
Service page template
- H1: Service + City + benefit
- H2: Common problems / customer needs
- H2: Our solutions (details)
- H2: Pricing / quote / timelines
- H2: FAQ
Local page template
- H1: Service + City
- H2: Service area / availability
- H2: Why choose us in [City]
- H2: Examples / projects
- H2: Reviews / FAQ
Article / guide template
- H1: Topic (clear promise)
- H2: Definition
- H2: Steps / method
- H2: Mistakes to avoid
- H2: Checklist / FAQ
Concrete examples (Digiseo style / Morocco)
- SEO Agency Casablanca: Audit + Strategy | Digiseo
- Used shelving: Stock + Delivery France | Rackdiscount
- Surf Camp Taghazout: Surf + Yoga + Coworking | Adventurekeys
How do I check if my Title tag is working?
SEO Agency Casablanca – Audit & Strategy
Our SEO services
On-Page SEO
Technical SEO
Link building & content
Surf Camp Taghazout
- Surf & Yoga Stay
Our activities
Surf lessons
Yoga sessions
Coworking & relaxation
Common mistakes (and solutions)
Mistake 1: Multiple H1s on the same page
→ Impact: less clarity, diluted main signal
→ Solution: keep 1 H1 and turn other “titles” into H2
Mistake 2: Broken hierarchy (H1 → H3 directly)
→ Impact: illogical structure and harder to follow
→ Solution: respect the structure H1 > H2 > H3
Mistake 3: Vague titles (“Introduction”, “Our services”)
→ Impact: low semantic value, less useful for users
→ Solution: use specific, intent-focused titles (“SEO services in Casablanca”, “Audit steps…”)
Mistake 4: Very long sections without H2
→ Impact: difficult reading, especially on mobile
→ Solution: split into shorter sections with H2/H3
Mistake 5: Repeating the same keyword in all titles
→ Impact: unnatural titles, less readability
→ Solution: vary naturally using close variations (synonyms, questions)
How to quickly check if your Hn structure is correct
- The page has a single H1 (main topic)
- H2s correspond to key questions/sections
- H3s are only used to detail an H2
- You can understand the page by reading only H1 + H2 (a good simple test)
Further reading
Frequently Asked Questions
Because the H1 represents the main topic. Having multiple H1s can make the page less clear and dilute the main signal.
Yes, but naturally. H2 and H3 should mainly organize content and answer questions, not just repeat keywords.
No. Use H3 only if you have multiple sub-points to explain. Otherwise, an H2 with paragraphs is enough.
Read only H1 and H2: if you already understand the main idea of the page, the structure is good. Then check that each H3 logically belongs to an H2.
Still looking for answers? Contact our SEO experts today.
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