Under extereme pressure to improve the search results, on 24/02/11, GOOGLE announced that it has made a "BIG AlGORITHMIC IMPROVEMENT", That unlike other changes could be noticeable to its users. Google's Amit Singhal & Matt Cutts, announced this change.
This change has already affected 11.8% of the search queries. This update will be a setback to the sites with low quality content or more precisely copy pasted content or less informative content.
Based on this Algorithmic Update, Some sites will go up the ranking and some will fall in the ranking.
Read full articles on :
http://snasm.com/article/google-announces-big-algorithmic-improvement-search
http://searchengineland.com/google-forecloses-on-content-farms-with-farmer-algorithm-update-66071
http://googleblog.blogspot.com/2011/02/finding-more-high-quality-sites-in.html
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