Install for These Features from Google
Samsung's Experience 9.0 UI is a big part of the company's Android Oreo update, but Galaxy S7, Galaxy S7 Edge, and Galaxy S7 Active users also get some of the base level Oreo features from Google.
On top of Samsung's features, Galaxy S7 owners get Notification dots, Notification snoozing, Autofill API, Adaptive Icons, and improved copy and paste. It also comes with picture-in-picture mode.
If you're unfamiliar with Google's Android 8.0 features, you should take a look at our Android 8.0 Oreo vs. Android Nougat walkthrough.
It'll get you caught up to speed in a few minutes.