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Search marketing in the new media era.

June 07, 2007
 
PageRank Explained

J.P. sent me a great post this morning describing the intricacies of PageRank. Most of this wasn’t news to us. In fact, it was nice to see more scientific proof to what we’ve said for years. Here are a few things that we learned:

  1. PR(A) = (1-d) + d(PR(t1)/C(t1) + … + PR(tn)/C(tn))—It’s the PR formula.
  2. With regard to ranking popularity, there is weight given to site age and duration, but this doesn’t transfer to PageRank.
  3. Wikipedia links don’t improve PageRank automatically (update: but pages which extract information from Wikipedia might improve PageRank). This puzzled us because Wikipedia uses nofollow. So automatically or otherwise, I don't see a site getting new link juice from Wikipedia anytime soon.

Ultimately, I’m still a believer that PageRank is Green Pixie Dust. Screw the green bar! Worry about the context and relevance of your links, not the volume.


Jeremy | permalink | +marktd |



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