Which type of Google update is come and how it define as panda 4.0 google alogrithm ?

Google have confirmed on Twitter that what webmasters were seeing over the weekend was not the Penguin update we are expecting, but rather a core ranking algorithm update. Google Ranking Algorithm Update 2016 Jan 9th. Panda is now baked 2016 in as one of Google's core ranking algorithm. Panda is an algorithm that’s applied to sites overall and has become one of our core ranking signals. It measures the quality of a site, which you can read more about in our guidelines. Panda allows Google to take quality into account and adjust ranking accordingly.