Hello I Want to Ask that in dofollow blog if We leave Comment with link, Is that link Count to Increase Google PR. and Also Want To know if You Can Tell me The basics of Commenting on The Types of Blog... I'm New Beginner and Learning SEO so plz do help me by Providing some Good Reference as well.. Regards; Pranjal Bhardwaj
Comments are known to improve SEO on some occasions but not all since some sites aren't do follow sites. One important thing to know is to that the page you comment on should have a significant page rank for you to benefit from it.
Most blogs with high Google Page Rank have now changed comment links to nofollow so you will not receive a benefit. If you Google dofollow and nofollow you can learn how to check if a site passes page rank to its link. There is also a Firefox Extension called NoDoFollow which color codes links depending if they are no follow or do follow.