Currency is a system of money that is used as a medium of exchange for goods and services. It can take various forms, including physical coins and banknotes, as well as digital currencies. The value of currency is often determined by factors such as supply and demand, economic stability, and government policies. Different countries have their own currencies, like the US Dollar, Euro, and Japanese Yen. These currencies can be exchanged in foreign exchange markets, where their values fluctuate based on economic conditions. Currency plays a crucial role in global trade and finance, facilitating transactions between individuals and businesses.