When booking a hotel, what does the room reservation time mean?

This is the last room the hotel reserved for you. For example, you booked a room at noon and didn't leave until 23:00. Then, if you haven't left by 23: 00, they can sell your room to other guests if they are nervous. If you can't arrive on time, you need to call before 23: 00 to change the reservation time, because the hotel can't reserve a room for you for the whole night. It often does.