Back-links that we known as Incoming links on our sites called as back links or inbound links. Back-links helps to improve website ranking in search engines and without back-links it tough task to come your site in search engine. Most of Webmasters try to get more and more .edu back-links because good .edu links essential for website ranking.
Most people don't know how beneficial .GOV and .EDU backlinks can be, or whether they're useful at all for a website. It is easy to confuse their importance with that of other TLDs (Top Level Domains) such as .COM, .NET etc, and you'd figure that since .COMs are the most popular and the most expensive, ergo they're the most important. We'll, you'd be wrong to think that. A website's trust rating is far more important that what it cost to set it up. And as you can imagine, .GOV and .EDU top level domains enjoy a special level of trust which is regarded very highly by search providers such as Google, Bing and Yahoo. And backlinks from such domains can take your website's rank to another level
Google and even other top search engines consider trusted website to those websites who have .edu links in their websites. If you want to increase your page rank and improvements in search engine ranking then you should try below links comment there and get back-links.