A number plate, also known as a license plate, is a metal or plastic tag attached to a vehicle that displays a unique combination of letters and numbers. This combination serves as an identifier for the vehicle, allowing authorities to track ownership and registration. Number plates are typically issued by government agencies and vary in design and format from one region to another. In many countries, number plates are required by law for all motor vehicles, including cars, trucks, and motorcycles. They often include additional information, such as the state or country of registration, and may feature symbols or designs that represent local culture or heritage. Vehicle registration and traffic laws are closely related to the use of number plates.