href sets the URL for a (hyperlinks) and link (linked resources: stylesheet, favicon, canonical, etc.) tags.
a, link, area, base
An absolute URL (https://...), a relative path, an anchor (#id), or a mailto:/tel: scheme.
<a href="/pricing">Pricing</a> <a href="mailto:info@example.com">Email us</a>
The href, target, rel, and download attributes of the <a> tag, with examples.
The target attribute of a and form: which browsing context (tab/frame) to open the result in.