Smartwatches?

I checked out some smartwatches here for the first time today, and I’m still trying to wrap my head around them. They seem to have plenty of features, but I need some clarification on what these actually mean in practice:

Core Functions:
1. Altimeter
2. Pedometer,
3. Sleep tracking,
4. Remote camera shutter,
5. Bluetooth music control,
6. Call recording notifications,
7. Bluetooth anti-lost alert,
8. Bluetooth calling,
9. Contact list syncing.
10. Sensor: 3D accelerometer
11. Motor: Support
12. Speaker: Support (single)
13. Microphones : Support ( single)

I’m a bit confused by this list:

4. remote camera
6. support call recording push
9. the phone book push.
10. Sensor: 3D acceleration sensor
11. Motor: Support
12. Speaker: Support (single)
13. Microphones: Support (single)

Could someone clarify what these specific points actually mean? Please.

I get what those sentences mean, but I'm still not sure how to actually apply them to my work.
If anyone could clarify the practical side of things, I’d really appreciate it.