So for example when I leave a comment my code looks like this:
<a href="http://alyssajfreitas.blogspot.com">Alyssa J Freitas</a>. I put the title of my blog as the text that appears but you can repeat the URL so people will know exactly where the link will take them.
Give it a try in the comments on this post to test it out!
-Alyssa J Freitas