Snoring happens when the muscles in the throat relax during sleep, which causes the tongue to fall back and block the airway.
Okay, there is plenty of controversy about whether this aid is proven to work or if these are a mismanagement of one's money.
snoring for kids
I ve also come across people buying custom anti-snoring mouthpieces or other snoring aids for very expensive prices, which is often what their dentists suggest (they re that desperate ; I personally understand their motivations for it but paying that much isn t worth it).