Link Diversity definition: having different types of links pointing to your site.

This means that you will post some blog comments, build forum profiles, guest blog posts, etc.  Basically having as much variety in your link building strategy as possible.  This helps hide your links from competitors.  When you’re trying to get a number 1 ranking, the easiest thing to do is steal your competitors links.  That means you go to each site where they have a link, and try to get a link.  This is one strategy that is very common among professional link builders.  The exact strategies are different, but the principal is heavily used.