Heading hierarchy
A heading hierarchy divides a document into named sections with an explicit information structure.
How it works
A clear h1 followed by nested section headings helps readers and machines associate claims, examples, and caveats with the correct topic.
How to validate it
Extract headings in source order, flag unexplained level jumps, and confirm that headings describe sections rather than decorative fragments.
Common failure
Choosing heading levels only for font size creates a misleading outline even when the rendered page looks correct.
Machine-readable editions
The same article is available as Markdown and JSON. These alternates are linked here but are not submitted through the sitemap or IndexNow.