Part of macOS
configdNetwork settings
○ Leave it
Applies your network settings.
What it is
Keeps track of network and system configuration.
If you stop it
macOS starts it again straight away. Leave it.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
configd
From Procession’s guide, in the words the app shows.