Social Media Greece

Nofollow vs. Dofollow:

Not all links are “follow”. Some links will permanently remain rel=”nofollow”, including:

• Links found within comments
• Our automatically generated links to “similar content on the web”.
• Brand new pages and recently-added authors are liable to remain “nofollow” for a period of time.

Beyond that, the rules determining which links and pages use “follow” vs “nofollow” will change over time as we adjust our policies to find the right balance for users and search engines

Example

For those of you who are technically inclined, here is an example. Visit this high quality sample knol on Backpacking, and select “View Source” in your browser. Search for where “follow” and “nofollow” appears on the page. You should see that the page itself gets a global “follow” directive, but certain individual links get rel=”nofollow” directives.

FAQs

• Follow our Content Policy
• Follow our Best Practices
• Beware of performing behavior that is “spammy”. Produce knols that serve the public and not a narrow commercial interest. Avoid bulk uploading of non-unique content.
• Be patient, as our signals do fluctuate over time, and it may take a while for a new user to accrue some trustworthiness.
• If you know that you satisfy all of the above, you can contact us at knolhelp@google.com and report it as a possible bug.

source: http://knol.google.com/k/follow-vs-nofollow-links-in-knol#

other: Nofollow vs. Dofollow: The Verdict is In.