Google has released three major algorithm changes during April. The Panda updates have targeted sites with duplicate content & content spammers.
Penguin, which was launched on April 21 is seen to be penalising sites that:
• engage in keyword stuffing
• participate in link schemes / back linking (where the majority of links are sponsored links, are from unrelated websites, are from directories, exchange pages or low quality blogs)
May 17, 2012 by Kris McDougall