Link is useful to bring your reader to a site you want and bring them to your posting when you're comment in other blogger's blog.
All you need to do is copy these code ;
<a href="LINK THAT YOU PREFER"><b>YOUR WORDS OR POST TITTLE</b></a>
- LINK THAT YOU PREFER - example ; http://vinndycouple24.blogspot.com
- YOUR WORDS OR POST TITTLE - Example ; Read here / how to do link in comment or post.
And you're done.