Nitrous oxide or N2O (sometimes listed as n20) is the same gas as what is known as laughing gas.
Nitrous Oxide (N2O) is in whip cream charger bulbs which are used in combination with a cream whipper for whipping cream and other things such as making foams from sauces and mouses.
Nitrous oxide is also used from infusing flavours into alcohol for cocktails and other alcoholic drinks.
Nitrous oxide (aka laughing gas) is what is used by doctors/surgeons and dentists as an aesthetic to reduce pain when they are drilling your teeth or other things that are normally painful.