Does commenting on high PR blogs help in building quality backlinks? How if the site has a no follow backlink? is the comment considered a quality backlink?
Most good blogs don't have dofollow links on them, but the links from high quality blogs like TechCrunch can help in driving traffic as long as you're staying relevant to the topic and providing good content for the reader, plus it still is a link and it may benefit you, because Google's algorithm is such a mystery anyway.
obviously if a blog has no follow active, that won't be of any use to PR. But I think they still count as a back link, so that's good enough.
It is worth doing blog commenting if the blog is do-follow. It will help in increasing the PR. But do not expect much traffic from it.
If of course you do comment on a blog with a do-follow, make sure they're too much external looks also. Google may simply disregard that link and your effort put into that comment will be of no use. But as andrewwise suggested, just keep to the topic and you should be dandy. - A
Blog commenting will help you in getting backlinks. Remember, google is not the only search engine. Yahoo, listing all dofollow or nofollow links in their search results. If you are concentrating on google, try to do it on dofollow blogs which will help you in page rank too.
I don't think posting comments on 'old' high PR posts helps all that much. Most of these high PR posts already have loads of comments. You are better off commenting on latest posts that you find interesting.
I've heard that quoting on low PR is some times better because you are more likely to get return visits. No?
why would you just be looking at google? There are other search engines, so I'm told... Also, you could get some direct traffic; if you use the anchor text you can get a 'mention' in the serps for your domain name; and there's even some doubt as to whether google implements the nofollow code correctly across all datacenters. Oh, and it can help get your site spidered in the first place. Enough for you? Or should I go on?
We take the view that high PR blogs generally don't follow. We still comment on them because of their popularity: we hope that some of their readers might like our comments and visit our blog. Even better, the blog author might take notice of our blog and maybe either comment on one of our posts or even write a post linking to one of ours. We think commenting on high PR blogs, regardless of whether we get backlinks or not, at least gives us some credibility.