A 'friends link' is a special link that shows up when you set a blog to the friends privacy setting.

This link can be used to see your blog with out signing into toadfire.com. It is perfect for your friends that do not have an account on toadfire.com. You should give this to people you would like to read your blog when your privacy setting is set to friends.

Toadfire users that you have added as friends do not need this link. When they are signed into toadfire.com we already know they are your friend and will let them see your blog.