Which kind of Backlinks are benefit for pr update? i am newer for seo, and those days, i hear that pr is close with the backlinks. and so i have built many backlinks such as unrelative and nofollow ones, and when you search link:babatek.com for my site, you can find many of those backlinks. my question is that:if those unrelative and nofollow backlinks can promote my website's pr?
The no follow links do not carry PR so it would not be helpful for your site in terms of increasing PR but yes it would help in SEO if the sites have similar theme and thematically relevant.
nofollow links are useless....well not interily since they can bring you traffic, but not PR unrelated link will bring only small benefits, and may even bring you a penalty if all your links are unrelated. Google is not stupid.
In a way, any link has the potential to carry benefit if not strictly PR. Even if it's a no follow but on a relevant quality site, it could bring traffic and new visitors. As far as PR is concerned, i would say It's always better to have a follow link from a page that doesn't have too many existing outbound links (Including external and internal). I would say a maximum of 50 existing links or less. A PR4 page with 200 existing links is going to pass far less PR benefit to your site than a PR4 page with just 30 existing links. Hope it helps.
if you get success achieving link from .gov or .edu site as well as back link from good PR then it will be more effective to achieve good PR early....
No follow links do not pass PR juice... but they are still useful for driving traffic to your site especially of they are relevant links.
If you are really aiming to get something from Google then you avoid getting back links from irrelevant and nofollow for your websites. Its just waste of time. Put your effort in getting relevant and content back links.