Penguin 5, the algorithm meant to fight spam is active with the 2.1 version Spam filter of Penguin Algorithm. In fact the 2.1 version of Penguin release is known as Penguin 5. The improvement does not imply much on this version, hence Google calls it is as 2.1 versions. The 2.1 denotes only minor changes… Continue reading New Penguin Algorithm 2.1 To Replace Old Version!