<a href="link web address">Link Name</a>
I am posting this little piece of code mostly so I can easily find it when I need it again. I am always having to go back and search the forums for it. Now, it is conveniently on my blog :)
If you want a link to another product in a product description on Teachers pay Teachers just replace the necessary information into the code at the top of this post. It is really helpful if you have "sister" products.
I would caution new members to TpT to only have one link in any product description - too much and it just looks like a random advertisement instead of the helpful suggestion it is :)