in transit definition usps is a tracking status used by the United States Postal Service to indicate that a package is currently moving through its network but hasn’t reached the destination yet. This phase may include processing at distribution centers, regional facilities, or transit between hubs. Customers seeing this status should expect their package to be delivered soon, though the exact delivery date may still be pending. For online sellers, understanding USPS tracking terminology helps manage buyer expectations and reduce support inquiries. Integration with fulfillment systems that update customers in real-time can enhance transparency and trust throughout the shipping process.