Nitrous oxide is a colourless gas. It has two nitrogen atoms and 1 oxygen atom denoted as N2O. Nitrous oxide is typically used for sedation and pain relief by medical doctors & dentists. It has also been misused by people for recreational purposes.
Another use for nitrous oxide gas is as a petrol booster in cars. Nitrous oxide is not flammable at cooler temperatures. However, when super heated the oxygen is detached & helps combust the cars usual petrol and release more energy.
The nitrous oxide available here is for cooking purposes. It can be used as a foaming agent in food and drink, whipping cream, making mousses, infusing flavours into alcohol & many other culinary uses.