<main>
The document's unique dominant content region — the main landmark screen readers jump to.
Baseline: Widely available · Sectioning & landmarks
When to use it
Exactly one per page, wrapping everything that is the page's actual subject; give it an id so the skip link can target it.
When not to
Never more than one visible main, and never put site chrome (nav, banners) inside it.
Key attributes
id- skip-link target
Example
<main id='main'>
<article>…the page's subject…</article>
</main>