SEO Fundamentals: Header Tags

A brief guide describing the minimum SEO requirements for headings and how header tags should be used within a webpage.

Oscar de la Hera Gomez
Written by Oscar de la Hera Gomez
First published on 12/23/2023 at 10:51
Last Updated on 12/24/2023 at 06:08
<p>A flower that represents SEO with the text "Header Tags" beneath it.</p>

A brief guide describing the minimum SEO requirements for headings and how header tags should be used within a webpage.

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The following article discusses the minimum SEO requirements for headings (i.e. h1 - h6) as well as the correct way to use header tags within a structured layout.

These details are based on years of research and the work of the World Wide Web Consortium (W3C).

"Headings communicate the organization of the content on the page. Web browsers, plug-ins, and assistive technologies can use them to provide in-page navigation."

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W3C

W3C: Headings

Minimum SEO Requirements: 1 H1, Minimum 1 H2

<p>A screenshot of Chrome showing the Mozbar chrome extension reading the SEO Fundamentals metadata webpage. The mozbar shows how we use 1 H1 tag and more than 1 H2 tag.</p>

Each webpage should have:

  • 1 H1 heading which should be around 60 characters in length (i.e. 0 or 2+ H1's are a violation of SEO fundamentals).
  • At least 1 H2 heading, each of which should be 70 characters in length or less.

Please consult the guides below to learn how to write good headings.

Ahrefs: What is an H1 Tag? SEO Best PracticesAhrefs: Header Tags

Headings Rank

<p>A screenshot of W3C that shows the correct way to structure H1-H6 headings. You should never place a H1 below a H2 - or as the World Wide Web consortium puts it "Skipping heading ranks can be confusing and should be avoided where possible: Make sure that a <code>&lt;h2&gt;</code> is <strong>not</strong> followed directly by an <code>&lt;h4&gt;</code>, for example. It is ok to skip ranks when closing subsections, for instance, a <code>&lt;h2&gt;</code> beginning a new section, can follow an <code>&lt;h4&gt;</code> as it closes the previous section."</p>

"Nest headings by their rank (or level). The most important heading has the rank 1 (<h1>), the least important heading rank 6 (<h6>). Headings with an equal or higher rank start a new section, headings with a lower rank start new subsections that are part of the higher ranked section.

Skipping heading ranks can be confusing and should be avoided where possible: Make sure that a <h2> is not followed directly by an <h4>, for example. It is ok to skip ranks when closing subsections, for instance, a <h2> beginning a new section, can follow an <h4> as it closes the previous section."

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W3C

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