Penguin Update

Launched in 2012, Penguin was essentially a web spam update, adjusting a number of spam factors such as keyword stuffing and other over-optimization tactics. The focus on creating high-quality, remarkable content carried over from Panda.

The Penguin algorithm is a filter that assembles on top of Google’s regular algorithm and attempts to catch link spam. Link spam refers to the controlling ways that spammers and black hat SEOs create links to boost their rankings in theSERPs. This is usually done using software, so the links and content it creates are generally useless for human readers – the very definition of spam.

Below see the list of released dates of Penguin update:

-May 25, 2012 – Penguin 1.0
-April 24, 2012 – Penguin 1.1
-May 26, 2012 -Penguin 2 on (impacting less than 0.1%)
-October 5, 2012 -Penguin 3 on (impacting around 0.3% of queries)
-May 22, 2013 -Penguin 4 (impacting 2.3% of queries)
-October 4, 2013 Penguin 5 (impacting around 1% of queries)