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Does Google Consider Historic Data In Query Results?

Bill Slawski looks at Google's Information Retrieval -- based on historical data -- a patent granted in 2008 that takes advantage of recording continuous changes to a site. The patent focuses on two goals -- to help identify Web spam, and to avoid stale documents being returned in response to a query. It raises questions such as how important the age of domains and links has become, and whether Google favors fresh content sites over others. Other considerations include the weight of Web sites on rankings, and when someone new purchases a Web site and makes changes does the PageRank for that site start to evaporate or expire?

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