The foreign exchange market (Forex, FX, or currency market) is a worldwide decentralized over-the-counter financial market for the trading of currencies. Financial centers around the world function as anchors of trading between a wide range of different types of buyers and sellers around the clock, with the exception of weekends. The foreign exchange market determines the relative values of different currencies.
So now you know a little bit about Forex. Even if you don't know everything, you've done something worthwhile: you've expanded your knowledge.