rel="external" attribute value informs search engines that the link is on a domain that is outside the current website.
This is mostly used when including a link that is outside the web server.
Two <a> elements with an
The links reference pages from an external server (domain).
<p> The development of Impressionism in the visual arts was soon followed by analogous styles in other media that became known as <a rel="external" target="_blank" href="https://en.wikipedia.org/wiki/Impressionism_in_music">impressionist music</a> and <a rel="external" target="_blank" href="https://en.wikipedia.org/wiki/Impressionism_(literature)">impressionist iterature</a>. </p>
The rel attribute defines the relationship between the current page and the linked page or resource.
rel="external" instructs search engines that the link is outside the current website.
It also allows CSS attribute selectors to style external links so they look different from local links.
<tagname rel="external" />
These elements accept the external value on the rel attribute.
|<a>||Specifies an anchor link -- see example above|
|<area>||Creates clickable areas inside an image map.|
|<form>||Specifies an HTML form.|
Here is when rel support started for each browser: