An “edu backlink” 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 Pagerank the more quality .edu’s, the better.

An Getting “.gov Backlinks” from Government site seems to be one of the best ways to boost your site’s ranking up on search engines

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 (not like other blog network posts, or mass comments).

Your URL will be inserted in the account / profile details, I’m registering a new account on 20 different domains, therefore they would be 100% unique with very low OBL (other external links) close to none.