we all know that backlinks really helps improve ranking but how about blog commenting it really helps to improve rankings? and what if you creating comment even on not relevant sites it is harmful or not? What if i comment in no follow blog sites can i also gain backlinks to improve my rankings? Anyone can give your brief explanation..
Blog commenting on high pr pages with low obl is fastest way to improve ranking but do not post more than 5 links per day otherwise it it will spamm.
A: yap each and every link which is pointing to your website is helps to improve your rankings as well as you pageranks. if u are generating back-links from irrelevant blog is crap for your website u are wasting your time on that things. relevancy is must, you can just get crap of backlinks from there. quality is important, quantity is just crap.. no follow and do follow concept is still not very clear there are lot of controversy.according to me you cant gain anything from no follow links..
Definitely, Blog commenting will help you to get good back links. but you need to get it from your niche related blogs.
Blog commenting used be a good way to get back links an pr juice once upon a time. Unfortunately, few people abused this and this led to comment spam. So now most blogs are nofollow by default. The nofollow attribute tells google that this is an external link and i don't trust it , so don't pass pagerank to that page. So the very point that you would do this kind of link building has been defeated. I would suggest not to waste time in blog commenting cause it's not gonna help u rank.