Customs authorities are government agencies responsible for regulating the flow of goods and people across national borders. They ensure that all imports and exports comply with local laws, including tariffs, taxes, and safety regulations. Their main goal is to protect the economy and public health while facilitating legitimate trade. These authorities also play a crucial role in preventing illegal activities, such as smuggling and trafficking. They inspect cargo, enforce customs laws, and collect duties on imported goods. By doing so, customs authorities help maintain national security and support fair trade practices within the global market.