panda algorithm

A document classifier developed by a Google engineer (Navneet? Panda) in 2010 and used beginning in a succession of algorithmic events dating from February 24, 2011 to downgrade (q.v.) documents matching low-quality criteria such that they no longer appear prominently in Googles search results, and may no longer to able to pass value through their links. The algorithms mechanism has not been published but disclosures from Google indicate it is a learning algorithm that scans large data sets to identify signals (statistical trends in the data) which may be used to approximate human judgement distinguishing between high quality sites and low quality sites as demonstrated through a large sample set of Websites evaluated by human quality raters. The algorithm was run against Googles index offline and the results released into the general search results every 4-6 weeks. Google suggests the algorithm now runs continuously in some fashion.

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