Part of macOS
trialdFeature settings
○ Leave it
Downloads settings Apple uses to tune features.
What it is
Fetches small configuration updates for macOS features.
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
trialdtriald_system
From Procession’s guide, in the words the app shows.