The US Dollar (USD) is the official currency of the United States and is widely used in global trade. It is represented by the symbol "$" and is divided into 100 smaller units called cents. The dollar is issued by the Federal Reserve, the central bank of the United States, and is one of the most recognized currencies in the world. The US Dollar serves as a benchmark for many other currencies and is often used as a reserve currency by countries around the globe. Its value can fluctuate based on economic factors, including inflation, interest rates, and overall economic stability.