Ee system purge explanation

This an insanely basic but vital question:
Is this a cache purging function?
The same as :22222/cache functions?

I don’t want to misuse this function due a to syntax or language misunderstanding on my part.

bump : )

The ee system purge remove nginx php mysql and postfix from the server
The https://example.com:22222/cache is a tool to view the cache status and clean the nginx fastcgi cache