The mark <mark> element represents a run of text in one document marked or highlighted for reference purposes, due to its relevance in another context.

Basically, it is used to bring the reader's attention to a part of the text that might not have been considered important or overlooked.

In the sentence above, I have highlighted "a part of the text" because I think that is a very important point that you must not overlook.

To mark part of the text, simply put your text in between <mark></mark>. It is that easy.

Basically, it is used to bring the reader's attention to <mark>a part of the text</mark> that might not have been considered important or overlooked.

As of writing, not every web browser renders <mark></mark> as highlighted text, to be on the safe side, it is also good you style the mark element in CSS.

mark { background-color:#ff9; color:#000; font-style:normal; font-weight:bold; }