Highlight the background of the text. Please note the example below:
HTML is great.
<p><mark>HTML</mark>is great.</p>
I found this tag at html.com
HTML also provides the time element for marking up times and dates in a machine-readable format. For example:
<p><time datetime="2016-01-20">20 January 2016</time></p>
I found this tag at mozilla.org
An HTML form is used to collect user input. The user input is most often sent to a server for processing. Please note the example below:
<p><form>
<label for="fname">First name:</label>
<input type="text" id="fname" name="fname" value="">
<label for="lname">Last name:</label>
<input type="text" id="lname" name="lname" value="">
</form></p>
I found this tag at w3schools.com