Which are the major Google updates that have impacted SEO?

The major google updates that have impacted seo are following
Diversity update
Core update
Indexing bugs
Deindexing bugs

Hi Friends,
Most Significant Google Algorithm Changes

• June 2019 Core Update & Site Diversity Update. Launch date: June 3–8, 2019.
• 
  March 2019 Core Update. Launch date: March 12, 2019.
• 
  Fred. Launch date: March 8, 2017.
• 
  Possum. Launch date: September 1, 2016.
• 
  RankBrain.
• 
  Mobile-Friendly Update.
• 
  Pigeon.

Hummingbird.

The major Google updates that have impacted SEO are following
a) Possum
b) RankBrain
c) Mobile-Friendly Update
d) Pigeon
e) Hummingbird

Impressive, thanks for sharing such knowledge guys.

Two major updates that reallly shakes SEO world are Penguin and Panda.