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Heading Standards

Last Edited: 2026-06-29 01:32

H1 Tag

The primary on-page heading element that defines the specific context of the content for the user.

• Input: The <h1> HTML element.
• Standards:
  1. Keyword Placement: Must feature primary target keywords and be more descriptive than the Page Title Tag (Ref: Metadata#Page Title Tag).
  2. Frequency Limit: Exactly one H1 is allowed per page.
  3. Linking Prohibition: Headings define the content outline and must never contain navigational links (Ref: Links#Linkable Elements).

H2 - H6 Tags

Secondary heading elements used to divide and semantically outline the sub-sections of a document.

• Input: The <h2> through <h6> HTML elements.
• Standards:
  1. The Cascade Rule: Headings must follow strict numerical order (H1 > H2 > H3 > H4 > H5 > H6). Never jump multiple tiers downward (e.g., H2 > H5 is prohibited).
  2. Visual Sizing: Styling must correspond to hierarchy (lower-tier headings should not visually exceed the size of higher-tier ones).
  3. Linking Prohibition: Headings define the content outline and must never contain navigational links (Ref: Links#Linkable Elements).