what is i1Profiler?

The kernel driver listed is the correct one for i1Profiler.

The purpose of it is to create color profiles for monitors, printers, digital cameras, digital projectors, scanners, and anything else you can attach to a computer that captures, emits, or prints color.

i1Profiler is useless without the necessary profiling hardware to measure any of the above devices. If you have none, then you may as well uninstall it. Use the uninstall script directly from X-Rite to make sure the entire app is removed.

https://www.xrite.com/service-support/downloads/i/i1profiler_uninstall_scripts_v0

But what does it do? Is it worth keeping?

Why did you install it?

If you don't know what it is, or how it got on your Mac, I wouldn't allow it to load.