Last week post of ours mentioned a WebmasterWorld thread if Google had done any algorithm update and data refreshes. The answers for question is a no by Matt Cutts himself. On the blog he also talks about algorithm updates and data refreshes. He defines algorithm update “Typically yields changes in the search results on the larger end of the spectrum. Algorithms can change at any time, but noticeable changes tend to be less frequent.”
Data refresh means refreshing data within an existing algorithm. The changes most of the times are very small and are not even observed by people. Amongst the smallest kind of data refreshes is an Index update.
According to Matt Cutts “ there haven’t been any major algorithm updates to our scoring in the last few days, and I believe the only data refreshes have been normal (index updates). So what are the people on WMW talking about? Here’s my best MEGO guess. Go re-watch this video. Listen to the part about “data refreshes on June 27th, July 27th, and August 17th 2006.” Somewhere on the web (can’t remember where, and it’s Christmas weekend and after midnight, so I’m not super-motivated to hunt down where I said it) in the last few months, I said to expect those (roughly monthly) updates to become more of a daily thing. That data refresh became more frequent (roughly daily instead of every 3-4 weeks or so) well over a month ago. My best guess is that any changes people are seeing are because that particular data is being refreshed more frequently.”