Three New Tags

<dl> Description List Tag </dl>

The description list tag allows the user to create a list of terms and their descriptions. Each term is contained in a <dt> tag and each description is contained in a <dd> tag. The terms and descriptions are displayed together automatically without needing extra formatting. Please note the example below:

Example:
Dog
-loyal loving animal
Cat
-independent quiet animal
The code that produced the output above looks like this:

<dl>
<dt>Dog</dt>
<dd>-loyal loving animal</dd>
<dt>Cat</dt>
<dd>-independent quiet animal</dd>
</dl>

I found this tag at: w3schools.com

<em> Emphasis Tag </em>

The emphasis tag is used to emphasize text on a webpage. To accomplish this you must wrap the text you wish to emphasize in a set of <em> and </em> tags. Please note the example below:

Example:

Whatever you want emphasized should go here.

The code that produced the output above looks like this:

Whatever you want emphasized should go <em>here</em>

I found this tag at: freeCodeCamp.com

<mark> Highlight Tag </mark>

The mark tag is used to highlight text so it stands out on a webpage. Please note the example below:

Example:

This is highlighted text

The code that produced the output above looks like this:

<p>This is <mark>highlighted text</mark></p>

I found this tag at: developer.mozilla.org