Parts of apps
com.docker.…Docker service
◐ Close the app instead
Part of Docker Desktop, such as its virtual machine or networking.
What it is
Docker Desktop runs as several services.
If you close it
Docker may stop working until it restarts. Quit Docker Desktop instead.
The verdict
◐ Close the app instead. A part of an app. Closing it alone breaks something, so close its app.
In Activity Monitor
com.docker.…
… means any name that starts this way.
To read more
From Procession’s guide, in the words the app shows.