Why do you put so many pillows in the hotel? What's the use?

Generally, hotels will put four pillows to make passengers sleep more comfortably.

When you are away from home, your body fatigue will be higher. Another pillow is placed under your legs and cushions your lower body, which will make the whole body blood flow more. You can try it at home. You can sleep more comfortably with a pillow under your head and a pillow under your legs.