2 Identify Bugs
By interacting with and using iOS 12 beta, you can help Apple ensure that the OS provides a good user experience before it’s officially released. You get to work through the interface, apps, shortcuts, and any updates that Apple is pushing to users.
Probably one of the more rewarding things about this process is that you get to provide feedback to Apple through the built-in Feedback Assistant app. You can actively identify and submit any issues or bugs you come across as you interact with the OS.