To turn off an Apple Watch, follow these steps:
1. **Press and Hold the Side Button:**
- Press and hold the side button (located next to the Digital Crown) until you see the Power Off slider appear on the screen.
2. **Swipe the Power Off Slider:**
- Once the Power Off slider appears, swipe it from left to right across the screen using your finger.
3. **Confirm Shutdown:**
- After swiping the Power Off slider, you'll see a confirmation prompt asking if you want to turn off your Apple Watch. Tap on "Power Off" to confirm.
4. **Wait for Shutdown:**
- Your Apple Watch will begin shutting down. Wait for a few moments until the screen turns off completely, indicating that the device is powered off.
5. **Turn On (Optional):**
- To turn your Apple Watch back on, press and hold the side button again until you see the Apple logo appear on the screen.