track by usps is a service provided by USPS that allows users to track the status of their mail or packages using a tracking number. Once an item is shipped, the sender and recipient receive a unique tracking number that can be used to monitor its journey through the postal system. The tracking number can be entered into the USPS tracking website or mobile app to receive real-time updates on the package’s location, estimated delivery date, and any delivery exceptions or issues. USPS offers tracking for a variety of shipping services, including First-Class Mail, Priority Mail, and Express Mail. This service is especially useful for e-commerce businesses and customers who want to track their orders and ensure they are delivered on time.