Interesting post on changes to Google’s search algorithms (& an overview of 9 algorithm changes that have been released to the public)
“Google is trying to become more open about their search algorithm changes. Beyond the much-discussed “fresh” update, Google discussed recent changes in SERP (Search Engine Results Page) titles and descriptions, date-specified searches, image search signals, and more.
While Matt Cutts called this “An experiment in radical transparency”, the information remains fairly veiled and covers only a small portion of the algorithm changes that have been made.”