MoneyMoney is a system and its units for exchanging value. The value of each unit is agreed to be worth something. Money is used to pay for things and services as well as debts. The history of the word money comes from mint, meaning to make coins, medals and tokens out of raw metal. Usually money is made out of paper and cheap metals, but sometimes it can be found made out of gold or silver. Which is to say, some money is made out of things that are already valuable.