As many people probably know backlinks are the bread and butter of successfully ranking any site high in search engines, such as Google. What you may not know is that not all backlinks are created equal; .EDU backlinks are among the strongest - but why?

There are backlinks from authority pages, backlinks that are DoFollow and NoFollow, those that come from authority sites and PRN/A pages, links with and without anchor text and many more variables that determine the weight of a backlink....