Slate published an article named Error Message: Google Research Director Peter Norvig on Being Wrong and a lot of people are talking about his philosophy on Google and him being wrong. Cool!

But he did lay down some tidbits on Google’s ranking algorithm. Let me share them with you. One of the more interesting quotes, for me, is:

So for the first search result, Google is looking for the “most popular” result to place first. Not necessarily the most relevant or the best match, but most popular. Great, so how about the second result, is that the second most popular result? No! Instead it is a diverse result, something that differs because “you don’t want something that’s almost the same as the first,” Norvig said.

As Tedster points out in the WebmasterWorldthread discussing this, he sees this often and this is where Query Deserves Diversity comes in.

Another interesting quote revolves around real importance of PageRank:

Forum discussion at WebmasterWorld& Google Blogoscoped Forums.