Source – searchengineland.com
The implementation of the second part of Spam, an algorithm that fights spam, began and ended yesterday, June 28, 2021.
Danny Sullivan announced the launch of the announced spam update on Twitter. He also mentioned that both parts of this spam update are global.
The second part of our spam update has has begun today, and it will also conclude later today, unless we share otherwise.— Google SearchLiaison (@searchliaison) June 28, 2021
As it became clear, the update affected the results of the main search and image search.