How Many type of update Google seo..?

[Zora2012]

First, let me get the obligatory “Google makes hundreds of algorithm changes per year, often more than one per day” boilerplate out of the way. Many of the named algorithms we hear about (Penguin, Panda, Pigeon, Fred, etc.) are implemented to address specific faults or issues in Google’s algorithms.
The Medic Update was one of the most cataclysmic algorithmic events to hit the SERP for quite some time and it's important to remember that. Much of the worry and intrigue surrounding the March 2019 Core Update gains its context from what occurred in August of 2018