overnight shipping is a premium delivery service offered by major couriers like FedEx, UPS, and DHL, designed to deliver packages within one business day. It’s especially useful for urgent documents, last-minute gifts, or time-sensitive commercial shipments. While more expensive than standard shipping, overnight services ensure speed and reliability, often including detailed tracking and guaranteed delivery windows. Businesses benefit from offering overnight options to customers who value rapid service. However, overnight shipping may be limited by factors such as destination, package size, and local courier availability, particularly in rural or international locations.