Link building is the process of creating backlinks for your website. It means link of a web page from other websites for a web page. It is a process that keeps on changing over a period of time. There are many approaches for link building as
1. directory submission
2. social bookmarking
3. article submission
4. press release
5. blog commenting
If link building is incorporated in a comprehensive search engine optimization approach, it will gain the full benefits from lonks from other sites and achive its potential.