What are the newest google algorithm for Search Engine Optimization?

Pretty much the same as it was before. The big changes are coming in 2021 when web core vitals hit the streets.

In the meantime follow the Google guidelines: https://developers.google.com/search/docs/beginner/seo-starter-guide

Thanks for the information.

Recently I got an article about google new algorithm. May update.
https://searchengineland.com/google-may-2020-core-update-rolling-out-today-334128
Is this the last update?

No, the last 'core update' was last week, December 3rd. Core updates are the big ones, but the algorithm undergoes small changes on an almost daily basis.

Yes, 
Core update is the latest update. In 'Core algorithm' search engine (Google) crawl and maintain its rankings on search results pages.