Customs agencies are government organizations responsible for regulating the flow of goods and people across national borders. They ensure that imports and exports comply with local laws, including tariffs, trade agreements, and safety standards. Customs agencies also collect duties and taxes on goods entering a country, which helps fund public services. In addition to enforcing trade regulations, customs agencies play a crucial role in preventing illegal activities, such as smuggling and trafficking. They work closely with other entities, including border control, law enforcement, and international trade organizations, to maintain security and facilitate legitimate trade.