Today is your lucky day.
The description field can take any html you throw at it.
Generally, the accepted way to italicize is with em tags.
<em>This text will be italicized</em>
This text will be italicized
These are the same tags that pop up when you click to italicize the code right here in the comments. Because of that, I don’t know how my post will end up being formatted. It should be code on top, with an example underneath.
You can also include links:
<a href="https://mysite.com/dogs">My Dogs</a>
My Dogs
Bold:
<strong>Bold Text</strong>
Bold Text
Or pretty much any other html.
The only tricky part is typing it all in that small box. If space is getting tight, you can click and drag the bottom right corner of the description box to make it bigger.