Does the rel="external nofollow" attribute only disallow search engines from passing PR only? Or does the attribute completely strip the outgoing link's passing of any authority. In other words, are links with rel="external nofollow" worth targeting for SEO purposes?
"nofollow" attribute stop that link to transfer PR/key for your site dont build backlinks with "nofollow"
for SEO its no good on Google, but some other search engines like Yahoo finds it ok. It may give your site some exposure anyways.
Sir, I do believe you are mistaken. MSN/Yahoo both support the nofollow attribute. They may crawl, and show it in the linkdomain: command, but they give no credit for it.
Yup. No problem. And I will give you one point that I forgot about when I made my initial post. If your pages are already indexed, Google appears at least to take the anchor text into consideration, without giving you any credit for the page itself. Odd, but seems to be true. So in that respect also actually, you were on the right track.
Haha I have a site right now that's not ranking worth a crap. Know why? 457 incoming nofollow links. Very few others. It was actually my experiment to confirm the nofollow. Next stage is firing off a couple hundred non-no follows, and seeing what happens. But I know this niche well enough to have a pretty good guess.
I don't think "no follows link" are of much worth. Also Google state: 1. NOT follow through to that page. 2. NOT count the link in calculating PageRank link popularity scores. 3. NOT count the anchor text in determining what terms the page being linked to is relevant for. Here is one link may explain in details: http://www.searchenginejournal.com/13-reasons-why-nofollow-tags-suck/4410/