Nitrous oxide is a colourless gas. It has 2 nitrogen atoms and a single oxygen atom shortened as N2O. Nitrous oxide is typically used for anesthesia and pain relief by medical professionals & dental professionals. It has also been misused by people for recreational reasons.
Another use for nitrous oxide gas is as a petrol booster in cars. Nitrous oxide is not flammable at low temperatures. However, when super heated the oxygen is broken off & helps burn the cars normal fuel and release more energy.
The nitrous oxide available here is for cooking purposes. It is utilised as a foaming agent in food & drink, whipping cream, making mousses, infusing flavours into alcohol & many other culinary applications.