Your Apple Watch can double as a neat little bedside clock, which makes it useful even when you're not wearing it.
Of course, the Apple Watch can not track sleep, but if you opt to keep it on charge at night rather than on the wrist, then turn it on its side to enable Bedside Mode.
To do this on your watch, you need:
1. Launch the Settings app on your watch;
2. Go to the General settings;
3. Scroll down and tap on Nightstand Mode;
4. Toggle on Nightstand Mode.