If I purchase a log roll link, is it a permanent link? Is it more effective than a link on the actual site (like having a link on the side navigation bar for instance)? Any help is greatly appreciated.
It depends on how long you want as well as seller want to sell (duration of link). It varies from 1 month to lifetime span. DON.
So I guess my next question is what is a blog roll? I thought it was just a blog post, but apparently not..?
No its not a post. But its just a link which you post along with a anchor text the sidebar of a blog.