Source To Know The Core Of Penguin 4.0 Update
According to Wikipedia Penguin is “a codename for a Google algorithm update that was first announced on April 24, 2012. The update is aimed at decreasing search engine rankings of websites that violate Google’s Webmaster Guidelines” – Now regarding with the latest update, Penguin 4.0 is having real-time data is refreshed in real time, so changes will be visible much faster, typically taking effect shortly after we recrawl and reindex a page.
Here’s the best source that we’ve seen in getting to know the core of Penguin 4.0 update that changes SEO
As far as SEOs noticing
SEO still works tad bit, on the off chance that you don’t link spam, you do not get penalized.
Rand Fishkin – “Every time Google improves on the Penguin algorithm, every time they improve on any link spam algorithm, those of us who don’t spam benefit.”