Part of macOS
launchdThe process starter
○ Leave it
Starts and looks after every other process on the Mac.
What it is
The first process to start. It launches everything else, and restarts system parts that stop.
If you stop it
It can’t be stopped while the Mac is running.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
launchd
From Procession’s guide, in the words the app shows.