Matt Cutts, Head of web spam team at Google, tweet on twitter that latest release would impact about 1 % of all searches.
Penguin 2.1 launching today. Affects ~1% of searches to a noticeable degree. More info on Penguin: http://t.co/4YSh4sfZQj
— Matt Cutts (@mattcutts) October 4, 2013
It means everyone is trying to improve their website that’s good for everyone but bad for those who are affected by this update. Before Penguin 2.1, Google has introduced another algorithm on his birthday know as Humming Bird. It just shocked all the SEO and webmasters who are not working according to these updates.
Lets have a look at all Penguin Update :
Penguin Update Released Date Changes
Penguin 1 April 24, 2012 3.1% search queries affected
Penguin 2 May 26, 2012 Affected less than 0.1%
Penguin 3 October 5, 2012 Affected 0.3% of queries
Penguin 4 or Penguin 2.0 May 22, 2013 Affected 2.3% of queries
Penguin 5 or Penguin 2.1 Oct. 4, 2013 Affected 1% of search queries