How it works
Headings describe the structure of a document. The main heading names the subject; lower levels divide that subject into understandable sections. Their level should reflect hierarchy rather than the desired font size. Clear headings help scanning and assistive-technology navigation, while ordinary styling can control their appearance.
A realistic example
A term page can use its term name as the main heading, followed by sections for explanation, example and checks. A FAQ question belongs within the FAQ’s structure instead of starting a second unrelated main topic. Repeating the whole service catalogue in headings obscures the page’s purpose.
What to check
Read the heading list without the paragraphs and see whether it forms a coherent outline. Check that headings describe their sections, do not skip levels arbitrarily and remain accurate in every language. Confirm that responsive styling does not hide a heading needed to understand the content.
Limits and next steps
There is no need to stuff exact keywords into every heading. A heading is not a substitute for useful text beneath it. Do not choose semantic levels to obtain a visual size; use CSS and keep the document hierarchy meaningful.