Answer:
It's believed that a person who sleeps on his back is prone to snoring. As such, sleeping on the sides helps to prevent snoring.
There are many anti snoring pillows out there to help stop snoring. These pillows are usually classified as othopedic pillow and they are designed in such a way that the central pillow area is thinner than the portions around the edges, helping you to sleep on your stomach or on the side. Commonly such kind of orthopedic pillow is made with memory foam. These pillows were developed by physicians as therapeutic aids. Doctors know all about the sleeping habits that contribute to snoring.
Snoring can be really irritating so you can also go to shops to by nasal things.