Commodity money is when something is a consumable item as well as a medium of exchange. The earliest money was commodity money. Money is a unit of account. It is a standard unit for quoting prices. It acts like a yardstick for measuring how much a good or service is worth.
Money is a store of value.
It retains its purchasing power over time so consumption can be delayed into the future. Money is a standard of deferred payment. It is an agreed upon unit of measure that lets people contract for future payments and receipts. It lets people borrow and invest. It is not only a yardstick to measure current value, but it can measure future value.