Major features are mentioned below. But the list is not limited to following only.
1. Adaptive Battery
2. Dark Mode
3. App Actions
4. App Timer
5. Adaptive Brightness
6. Slices
7. Accessibility Menu
8. Easier Text Selection
9. New Screenshot Shortcut
10. A New Home Button
Know more detail at this link:
https://www.fossmint.com/android-9-0-pie-features/
