Get a first look at the next version before it ships. You run it as a separate build, work through a short checklist, and flag anything that breaks. It's the fastest way to shape where the app goes next.
You get the next version as a separate build to try and test before it ships. It's a preview to play with, not an early update to your installed app.
Every build comes with a few things to try. Tick them off and leave notes on anything odd, no long reports needed.
Your notes go straight to me. Bugs you catch and ideas you raise shape the next release.