An "e d u back link" is simply a link from a public institution (University, High-School, etc) that points back to your page. These websites have a huge authority in real life but also in the search engines. Since authority is transferred in the same manner as Page rank the more quality .e d u's, the better.The process is 100% manual and after hundreds of test orders it resulted that it's also 100% safe to be used on any type of website.