Commodities are products like oil, gas, metals, and food that people need in their everyday lives. A commodity market is a place where people can buy and sell commodities. When people buy and sell commodities, it's called "trading". It's like a big game where people buy stuff for cheap prices and then sell it for higher prices to people who need it. It takes a lot of skill and knowledge to do this successfully. People who buy and sell commodities make money by trading when they buy something at a lower price and sell it at a higher price.