National seals are official emblems used by countries to represent their sovereignty and authority. They often feature symbols, animals, or historical figures that reflect the nation's identity and values. National seals are commonly used on government documents, currency, and official correspondence. Each country has its own unique national seal, which may vary in design and meaning. For example, the Great Seal of the United States includes an eagle and a shield, symbolizing freedom and strength. National seals serve as important symbols of national pride and unity, often recognized by citizens and foreign nations alike.