usps moving through network meaning refers to the status update that occurs when a package or letter is traveling through various USPS facilities as it makes its way to its destination. When the USPS tracking system shows that a package is “moving through the network,” it means that the item is in transit, being transferred between distribution centers, sorting facilities, or post offices. This update helps customers track the progress of their shipment, but the package has not yet reached its final destination or arrived for delivery.