What is backlink
 

Any link coming from any other website to your website is called backlink.
backlinks play the major role in getting search engine ranking. You should get backlinks from those websites only which have goof Page Authority and Domain Authority. You need to follow best backlink building strategies.

The link which redirects back to your website/page is called back link..

Backlinks are incoming links to a webpage. When a webpage links to any other page, it's called a backlink.

Backlink is a hyperlink that links from a Web page, back to your own Web page or Web site. Also called an Inbound Link these links are important in determining the popularity (or importance) of your Web site. Some search engines, including Google will consider Web sites with more backlinks more relevant in search results pages.