Heading Tag

Heading tags are HTML elements (H1 through H6) that define the hierarchical structure of content on a web page, from the main title (H1) down to the most granular subsections (H6).

Why It Matters

Heading tags are a primary signal for search engines to understand page topics and content structure. A well-organized heading hierarchy tells crawlers what the page covers and how subtopics relate. For users, headings are essential for scanning—about 80% of web readers scan headings and bold text rather than reading full articles. In the AI search era, LLMs use heading structure to extract answers for specific queries, making headings important for GEO as well.

Heading Hierarchy

Tag	Role	Rule
H1	Main page title	One per page
H2	Major section headings	Top-level topic divisions
H3	Subsections under H2	Detailed subtopics
H4–H6	Deeper nesting	Use sparingly, avoid excessive depth

Best Practices

• Follow logical order: Use H1 → H2 → H3 sequentially. Don't skip levels (e.g., H2 → H4).
• One H1 per page: H1 represents the page's core topic.
• Include keywords naturally: Place primary keywords in H1, related and long-tail variations in H2/H3.
• Be specific and descriptive: "3 Key B2B Content Strategies" beats "Introduction."
• Don't stuff keywords: Forced repetition in headings hurts both UX and SEO.

Common Mistakes

• Using headings for styling: Don't use H2 just to make text bigger—use CSS instead.
• Skipping hierarchy levels: H2 → H4 confuses crawlers' structural parsing.
• Over-heading: Adding H3 every 2–3 sentences fragments rather than organizes.
• Missing H1: Some CMS setups don't auto-generate H1—always verify it exists.

Sources:

• SEO Best Practices for Headings — Google Search Central
• Header Tags for SEO: What They Are & How to Use Them — Semrush
• Heading Tags: What They Are & Why You Need Them — Ahrefs