Perhaps you often find any sites or blog inform their reader that all link out on their blog are supported by “nofollow” tag link. Ya, Since Google, Yahoo and MSN support for rel=”nofollow” tag to reduce the link and comment spam that plagues many web sites, your link and comment in any website or blog would be devalued with this “preventing spam comment” tag. Farhan give a nice tips how to increase backlinks after most of major search engine support for that policy. We can increase backlink with “dofollow” blog.
Read the completed tips here.