SEO Tip #120: How Does Google Treat Sites Where All External Links Are No-Follow?
Matt Cutts: That’s a good question. Just as a refresher on the NOFOLLOW, it’s a general mechanism introduced in 2005. Essentially when we see a NOFOLLOW link going from one page to another page we say, “This page won’t flow PageRank and it’s dropped out of our link graph so it doesn’t flow any anchor text as well.” So essentially it doesn’t contribute anything in search engine rankings.
Now I think
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