Visit my site, please. Backlinking is a strategy of creating high-quality links between websites that are well indexed in Google. Let me explain the backlinking strategy with an example.
Assume A' be your website, and your website has a domain authority of only 2. And let X Y and Z be the high domain authority websites already indexed in Google with domain authority is of 50 60 and 70 respectively.
Being already having a domain authority if X, Y, and Z have links to website 'A' in their websites, then website A is said to have backlinks with websites X Y and Z. Now the domain authority of website will gradually increase. This process of creating backlinks is called a backlinking strategy.
The backlinks may be created through direct links in articles or links in comments. The backlinks that are generated through the commenting system is called comment backlinking.
Before going to the list of Dofollow Blog list, here is the Video, explaining the details of Backlinks by Matt Cutt.