A postal service is a system that allows people to send and receive letters, packages, and other mail. It operates through a network of post offices, mail carriers, and transportation methods to ensure that items are delivered to their intended destinations. Postal services can be local, national, or international, depending on the distance the mail needs to travel. In many countries, the postal service is managed by a government agency, such as the United States Postal Service (USPS) in the United States or Royal Mail in the United Kingdom. These organizations provide various services, including standard mail delivery, express shipping, and tracking options for packages.