<search>
A landmark wrapping search or filtering functionality — the semantic replacement for role='search'.
Baseline: Widely available · Sectioning & landmarks
When to use it
Around the form (and results controls) for site search, filtering, or any find-things UI.
When not to
It contains the search UI; it is not the input itself — that's input type='search' inside it.
Example
<search>
<form action='/search' method='get'>
<label for='q'>Search</label>
<input type='search' id='q' name='q'>
<button type='submit'>Go</button>
</form>
</search>