Why do people snore? This question has been pondered by many people but there has been little breakthrough in the medical field to produce an absolute one size fit all cure for snoring, and many people still suffer from this every night.
If there is anything to worry about snoring, it should be that heavy snoring is usually a pretty good and strong indication of snoring apnea, which is a serious breathing problem at night whereby not enough oxygen are being delivered to the brain, and it sleep apnea episode can happen for up to 40 times in a single night.
That being said, even if you do not have sleep apnea, you can definitely benefit from finding out why do people snore, and take preventive measures against it.
Not only you will thank yourself in the long run, even your sleeping partner will get better quality sleep.
Snoring usually occurs when there are some sort of blockage in the breathing passageway, and thus forcing the brain to revert to breathing using your mouth.
Ironically, snoring saves your life because it supply you with enough oxygen throughout the night, although no one will appreciate the by product of it, the snoring sound.
To pinpoint the exact cause of your snoring is usually pretty difficult, unless you have access to a sleeping lab where people can diagnose you scientifically.
Until then, there have been information available on the net about what is causing a blockage in your breathing pathway.
Blockage in the mouth area can usually be caused by any of the below, or a combination of the below:

Jaw - A weak jaw muscle can cause you to snore, when you sleep, the gravitational pull will force your jaw to move inwards.
When that happen, it can constrain and limit your air space and thus forcing your breathing to be more forceful.
This will in turn vibrates the soft palate at the back of your throat.

Nasal - A blockage in your nasal breathing pathway will usually cause you to snore.
Allergies, flu and cold are common cause of a nasal blockage, however those who suffer from sinus should seek medical help.

Tongue - During the course of your sleep, your tongue can accidentally drop into your throat, and causing you to have difficulty in breathing throughout the night.

Throat - Weak throat will restrain and shrink the amount of oxygen intake during the night, forcing you to breathe even harder, working while you sleep.

Considering the causes, what can you do about snoring? Like all other muscles in your body, muscles in your mouth area can be trained too, but where can you find exercises that tackle these muscles? Think of the professional singer, just like you, they have to train their muscles around the vocal cords to produce powerful enough voice for their career.
The good news is, there are a set of exercises derived from singing techniques professional used to warm up their vocal cords, it is known as the snoring exercise.