A mail carrier is a person responsible for delivering letters and packages to homes and businesses. They work for postal services, such as the United States Postal Service (USPS), and follow specific routes to ensure that mail reaches its destination on time. Mail carriers often sort mail at a local post office before heading out on their delivery routes. In addition to delivering mail, mail carriers may also collect outgoing mail from mailboxes. They play a crucial role in communication and commerce by ensuring that important documents and packages are delivered safely. Mail carriers often work in various weather conditions and may use vehicles, bicycles, or walk to complete their deliveries.