Banknotes are pieces of paper money that people use to buy goods and services. They come in different denominations, which means they have different values, like one dollar, five dollars, or twenty dollars. Each banknote usually has unique designs, colors, and security features to prevent counterfeiting. Countries issue their own banknotes, and they often feature important symbols, historical figures, or landmarks. For example, the U.S. dollar has images of past presidents, while the Euro showcases famous European buildings. Banknotes are an essential part of everyday transactions, making it easier for people to exchange value.