Heading Structure for SEO

Why headings matter for SEO

Headings do two jobs. For readers, they turn a wall of text into something skimmable, and most people skim before they commit to reading, so clear headings keep them on the page. For search engines, headings act as an outline that signals what each section covers and how the page is organized. A well-structured page is easier to understand, and easier to rank for the right terms.

One H1 per page

The H1 is your page's main heading, the equivalent of a book title, and there should be exactly one. It should clearly state what the page is about and usually contains your main keyword. Multiple H1s muddy the signal about your primary topic, and no H1 leaves search engines guessing. One clear H1 at the top sets the frame for everything below.

H2s for sections, H3s for sub-points

Under the H1, use H2s to label your main sections, the major parts of your topic. Within a section that needs more breakdown, use H3s for sub-points. This creates a logical nesting: H1 contains H2s, each H2 can contain H3s. Readers can scan the H2s to find what they need, then drop into the detail. It mirrors how a good outline works.

Do not skip levels

Keep the hierarchy clean by not jumping levels. Going straight from an H2 to an H4, skipping H3, breaks the logical nesting and confuses both assistive technology and search engines about how sections relate. Move one level at a time: H1 to H2, H2 to H3. If you find yourself wanting to skip, your structure probably needs a rethink rather than a shortcut.

Put your keyword in a heading

Work your main keyword, or a close variation, into at least one H2. Headings carry a little more weight than body text as a relevance signal, and a keyword in a subheading also helps readers confirm they are in the right place. Do not force it into every heading, which reads as spammy, but a natural placement in one or two is worth doing.

This guide explains structure. The Pro tool checks it.

Reading the rules is easy; auditing your own headings is tedious. The SEO Keyword Density Analyzer reads the markdown or HTML headings in your content, shows your outline indented by level, highlights headings that contain your keyword, and flags a missing H1, absent H2s, or a skipped level. The preview above shows what that looks like. This page only counts words; the tool checks the structure.