Couriers are individuals or companies that deliver messages, packages, or documents from one location to another. They often work in urban areas and use various modes of transportation, such as bicycles, motorcycles, or vans, to ensure timely delivery. Couriers are essential for businesses and individuals who need to send items quickly and securely. Many couriers operate on-demand, meaning they pick up and deliver items as requested. They may work for delivery services like FedEx or UPS, or as independent contractors for platforms like DoorDash or Postmates. The rise of e-commerce has increased the demand for courier services significantly.