Snoring is noisy breathing during sleep. It is a common problem among all ages and both genders, and it affects approximately 90 million American adults — 37 million on a regular basis. Snoring may occur nightly or intermittently. Persons most at risk are males and those who are overweight, but snoring is a problem of both genders, although it is possible that women do not present with this complaint as frequently as men. Snoring usually becomes more serious as people age. It can cause disruptions to your own sleep and your bed-partner's sleep. It can lead to fragmented and un-refreshing sleep which translates into poor daytime function (tiredness and sleepiness). The two most common adverse health effects that are believed to be casually linked to snoring are daytime dysfunction and heart disease. About one-half of people who snore loudly have obstructive sleep apnea.

While you sleep, the muscles of your throat relax, your tongue falls backward, and your throat becomes narrow and "floppy." As you breathe, the walls of the throat begin to vibrate - generally when you breathe in, but also, to a lesser extent, when you breathe out. These vibrations lead to the characteristic sound of snoring. The narrower your airway becomes, the greater the vibration and the louder your snoring. Sometimes the walls of the throat collapse completely so that it is completely occluded, creating a condition called apnea (cessation of breathing). This is a serious condition which requires medical attention.

https://sleepfoundation.org/sleep-disorders-problems/other-sleep-disorders/snoring.

Snoring is not a sign of sound sleep!

Snoring happens when you can't move air freely through your nose and throat during sleep. This makes the surrounding tissues vibrate, which produces the familiar snoring sound. People who snore often have too much throat and nasal tissue or “floppy” tissue that is more prone to vibrate.

https://www.helpguide.org/articles/sleep/snoring-tips-to-help-you-and-your-partner-sleep-better.htm

It is a disease,snoring can end up with apnea and even death.

http://www.dailymail.co.uk/health/article-1207269/Men-snore-twice-likely-die-But-noisy-sleep-sign-poor-health-cause.html

https://www.health.harvard.edu/blog/snored-to-death-the-symptoms-and-dangers-of-untreated-sleep-apnea-2017021311159

Allergies, Congestion and Certain Nasal Structures

Anything that prevents you from breathing through your nose can cause you to snore. This can include congestion from a cold or flu, allergies or deformities of the nose such as a deviated septum.

Alcohol, smoking, aging and certain drugs and medications, including muscle relaxants

You may snore when your throat or tongue muscles are relaxed. Substances that can relax these muscles may cause you to snore. This includes alcohol, muscle relaxants and other medications. Normal aging and the prolonged effects of smoking can also relax your throat and tongue muscles.

It is certainly not a sign of sound sleep!

I agree with Dr.Subbash C.Kundu.