What is the difference between a participant and an application?

I couldn’t find a clear answer/explanation to the post title in the documentation. As a random example of where I’ve seen these mentioned, the metering service docs can split reports up “per participant” but also “per application” (Participant Metering — Daml SDK 2.2.0 documentation), and I’m not sure what the difference is.

Thanks!

Application here is defined by the applicationId (which defaults to the user id if you use user management) used on command submissions. So it allows you to split things up further for things happening on the same participant.