Targeting Spam > do follow no follow - Webmaster Forum
[Webmaster Forum] The main difference between do-follow and no-follow is that do-follow links can help influence your PageRank while no-follow links won't affect it.i think it is for google is not for yahoo or other search engine.
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Some related posts from Technorati and Google.
[Webmaster Forum] Is google read nofollow rank - Webmaster Forum: Based on I read that "Googlebot does not follow no-follow links" but Therefore, even links with the No Follow attribute do have value;
[seOverflow Blog] Why You Should Build NoFollow Links « seOverflow Blog: There are whole lot of people in the SEO industry that believe there is absolutely no value in gaining an incoming link with the nofollow attribute applied to it. Since the nofollow attribute basically means that the search engines will not follow the link, it’s assumed that it’s a waste of time to try to earn these.
[Webmaster Forum] No Follow? - Webmaster Forum: I've heard a lot of people start saying that nofollow doesn't matter for backlinks. But just to be sure I make sure that when I'm building backlinks that they're dofollow by using quicksearchstatus and setting it to "highlight nofollow".
[Forum Doc] All forums should nofollow external links | Forum Doc: The nofollow attribute was introduced to reduce spam on blogs. Now its use is urged whenever a webmaster does not or can not vouch for the link.
[LovingTech Forums - All Forums] Does Google hate nofollow links?: If G penalized sites for incoming links I could eliminate all my competition by comment spamming hundreds of sites using my competitors URL. G ignores do-follow links and has stated that others can not harm your site using comment spam.
[seoFool.com] Controlling Pagerank With The rel=nofollow tag | seoFool.com: As a general rule, you should add the rel=nofollow attibute to all outgoing links to other people’s sites that you link to on your site. You should also add it to all links to any non-important pages like your contact page, or your privacy policy page, (not your sitemap page because we WANT the search engines to index that!)
[Webmaster Forum] High PR Blog Do-follow Blog Commenting Service! (Music Niche ...: The link will be permanent dofollow backlink, unless the admin closes down his site or made it to nofollow. 5. The page's PR is valid until next google PR update where it can get higher, lower or stagnant. 6. Website / Blog / Permalink ...
Reflected tags on Technorati: Blog, Nofollow, Targeting Spam