Shipment Tracking is a service that allows customers to monitor the progress of their packages as they move from the seller to the buyer. By using a unique tracking number provided by the shipping company, individuals can see where their shipment is at any given time, including its current location and estimated delivery date. This process typically involves online tools or mobile apps that display real-time updates. Shipping companies like FedEx, UPS, and DHL offer these tracking services, making it easier for customers to stay informed and plan for the arrival of their orders.