The Euro is the official currency of the eurozone, a region composed of 19 of the 28 member states of the European Union. The Euro is used by more than 330 million Europeans and is one of the world's most important currencies. In terms of investing and financial markets, the Euro is a major currency used in global markets and is an important currency for international trade. As a result, many investors and traders use the Euro as a way to speculate on the direction of global economic trends. Additionally, the Euro is an important reserve currency, meaning that central banks and other financial institutions often hold large amounts of the currency as a way to diversify their holdings.