Many SEOs have observed major movements in the results pages at the end of last week, November 28, in particular. Tremors felt heavily in the United States, but also in France, until December 1. Many have associated with deploying a new Google Penguin, Penguin version 3.1 so.
Google now has just confirmed that it was indeed the consequences of the deployment of Google Penguin, but the filter "ongoing" deployment. To believe the search engine, so it would be just the same Penguin 3.0, launched on 18 October. There is therefore now six weeks