what is back link?

[damn gorgeous]

A back link is an inward link to your site that may or may not be reciprocated with an ******d link back. If page A links to page B then a back link would be a link which goes from page B back to page A.

[oulee]

Any link which take visitors to you site from somewhere else.

[fdrix]

Well backlinks are the favors for your site! it will help your site to get on top of Google Ranking ! The more backlinks you have the more google will prefer your site!