Google’s new algorithms
Google is renewing its algorithms for search engine rankings. It can cause some significant rise/drop of website rankings, and SEO managers need to adjust for the new system. Adjustments are aimed to exclude “overly optimized” websites, and focus on quality of contents. Specifically, Google is attempting to downgrade websites that have too many hidden keywords to appear relevant. Also, the new system tries to detect junk back links that are used to increase apparent link popularity.
Google changes the system that it can better detect synonyms of search keywords. New system also puts more weights on Questions and Answers forms of websites, where web surfers can find specific answers to their questions.
Google is continuously changing its search engine algorithms, and rankings of websites changes dramatically as a result of this process. Website managers need to constantly monitor the policies implemented by Google, and make necessary changes if their websites are affected.
http://www.fortune3.com/blog/2012/01/quality-changes-google-search-algorithm-2012/