Dofollow comments are best way to rank your keywords because if you get theme link using dofollow comments in good pr blogs then you see good result in search engines.
This is what I was asking about - is it better to have comments on your own blog articles or to disable them?
Do-follow blog comments help you get high Rank on google. No-follow ones are only little useful. But if you have time,you can do it too.
yes,blog comment give good back links but not stay for a long time because owner remove after some time.
Yes, I get that you all know that if you see something about blog comments then you think you should come to the thread and type something about 'dofollow' and 'nofollow' Instead how about you try and read the first post of the thread or one of the other comments I have made here explaining that this is not what was asked and write something that is relevant, jeez Seriously, now I understand why there is so much terrible comment spam.
For SEO use dofollow blogs, but mixed blogs are usefull to beacause you can grow the traffic on your web site
It may be true that only dofollow links are crawled by google, but by leaving quality comments on nofollow blogs this will still lead to traffic, and then this traffic leads to improved search engine rankings. I prefer to leave comments on high traffic blogs with no follow, rather than on spammy dofollow blogs with a low PR.
Blog commenting can be useful if done properly. Comments need to appear relevant. Be careful and dont turn into a spammer though. I recommend no more than 50 a day. Some say 100+ a day is ok while others think 50 is too much. I think it depends on your site and current status but try to keep it under 50.
Blogs and do-follow are usefull for creating backlinks and some time if we post in site related sites then it creates traffic also.