Döviz refers to foreign currency or foreign exchange, which is the money used in other countries. It is essential for international trade, travel, and investment, allowing people and businesses to buy goods and services from abroad. The value of döviz can fluctuate based on various factors, including economic conditions and market demand. In many countries, döviz is traded in currency markets, where different currencies are exchanged at specific rates. Central banks, like the European Central Bank or the Federal Reserve, may intervene in these markets to stabilize their own currency's value against others.