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Remarks.

Remarks
  • An h1–h6 element must have both a start tag and an end tag.1
  • h1–h6 elements are block level elements by default (CSS style: display: block).2
  • h1–h6 elements should not be confused with the section element
  • Heading tags (h1–h6) are not related to the head tag.
  • Permitted Content: phrasing content
  • The different CSS-styles for headings differ usually in font-size and margin. The following CSS-settings for h1–h6 elements can serve as an orientation (characterized as 'informative' by the W3C)
  • Search engine spiders (the code that adds a page to a search engine) automatically pays more attention to higher importance (h1 has most, h2 has less, h3 has even less, ...) headings to discern what a page is about. :::