This section includes watch emoji of various types: sand, hand, chimney. In case you didn't know, I remind you that watch is used to tell time. People who are even more nerdy than I am call them chronometers.
Moreover, here you will also find clockfaces with arrows pointing at a particular hour. Everything is so precise, you can actually say what time it is. Hours, minutes, not seconds, but still. I have no idea why you might want to use this.