Matt Cutts, today announced on Twitter that Google has rolled out the Panda 4.0 algorithm impacting ~7.5% of queries that can be noted by the regular user while searching.

As we know that Google Panda deals with low quality spam content and prevents sites ranking in Google results that have low quality content.

Matt Cutt said that this is an update and not algorithm refresh, and is supposed to be softer and gentler as compared to previous versions.

Google Panda 4.0 affects different languages to different degrees, this algorithm is being said as softer stand towards websites as well as upcoming updates or changes will be based on this new algorithm calculation of Panda 4.0