Although Mark is also a name, it's not what this HTML attribute is used for.
Mark is used to describing a highlight of a text, to mark it, or highlight it.
How it works:
<p>This is some <mark>highlighted text</mark> using the Mark tag.</p>
And that will result in:
Custom styling the Mark tag permalink
We can also add custom styling to our mark tag.
This will give the following result:
Common use cases for the mark tag permalink
One place where you often find the mark tag being used is on search result pages.
You'll find the word you were looking for highlighted.
<h3>Search results for "Pikachu"</h3>
<p><mark>Pikachu</mark> is a mouse like Pokémon.</p>
<p>The evolution of Pichu is <mark>Pikachu</mark>.</p>
You can have a play with the following Codepen I set up to showcase the mark tag.
Browser support permalink
The mark tag is really well supported and safe to use.