Penguin 2.0 (#4) — May 22, 2013
After months of speculation bordering on hype, the 4th Penguin update (dubbed "2.0" by Google) arrived with only moderate impact. The exact nature of the changes were unclear, but some evidence suggested that Penguin 2.0 was more finely targeted to the page level.
SEO Updates: http://sultansayed.blogspot.in/
Ref:http://searchengineland.com/penguin-4-with-penguin-2-0-generation-spam-fighting-is-now-live-160544