A courier service is a company that specializes in the delivery of packages and documents. These services can be used for both personal and business needs, offering fast and reliable transportation. Couriers often provide tracking options, allowing customers to monitor their shipments in real-time. Courier services can operate locally, nationally, or internationally, depending on the company. They typically use various modes of transportation, including bicycles, motorcycles, vans, and airplanes, to ensure timely delivery. Many businesses rely on courier services to meet deadlines and maintain customer satisfaction.