The International Monetary Fund describes money as something that serves as a store of value, unit of account, and medium of exchange. Over the years, many things have been used as money including shells, peppercorns, gold and silver.
In ancient times, the value of money was linked to its alternative uses. Peppercorns, for instance, had an intrinsic value given by its uses as a condiment. Using this commodity as money was inconvenient because it was difficult to divide and standardize each unit. As time went by, precious metals became the most attractive choice to serve as money because of their durability, limited supply, replacement cost, and portability.