Parcel Tracking is a service that allows customers to monitor the progress of their shipments as they move from the sender to the recipient. By using a unique tracking number provided by the shipping company, individuals can check the current location and status of their package online or through a mobile app. This system provides real-time updates, including when the parcel is out for delivery or has been successfully delivered. Shipping companies like UPS, FedEx, and DHL offer this feature to enhance customer experience and ensure transparency throughout the delivery process.