An official follow-up on the penguin 3.0 update that was confirmed by Google. While many SEOs have dubbed this update Penguin 3.1, Google are referring to it as a part of the ongoing Penguin 3.0 rollout.
This update was released at an unusual time – Google have mostly refrained from launching updates during the holidays, although in this case the update was released right in the midst of the busiest holiday shopping week.
Following this update, a number of additional penguin updates were pushed out in a few days intervals. If your website was affected by this update, it is recommended that you disregard this intermediate state and consider checking your website’s condition prior to Penguin 3.0 and following Penguin 3.4 in order to draw conclusions of its status.