Part of macOS

`dasd`Background scheduler

○ Leave it

Decides when background jobs run, to save energy.

What it is

Schedules background work, such as backups and indexing, for when the Mac is idle or charging.

If you stop it

macOS starts it again straight away. Leave it.

○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.

From Procession’s guide, in the words the app shows.