Which of the following is a characteristic of USPS mobile app?

The characteristic that the USPS mobile app allows tracking via barcode scanning is indeed a key feature. This functionality enhances customer convenience by enabling users to easily track their packages without needing to manually enter tracking numbers. The app's ability to scan barcodes accelerates the process of checking parcel statuses, making it simple for customers to stay informed about the location and delivery timeline of their shipments.

Many shipping and tracking services offer various features, but barcode scanning is particularly effective in streamlining the tracking process for users who may have multiple packages to monitor. It reflects an integration of technology into everyday tasks, aligning with modern user preferences for efficiency and ease of use. Understanding this capability highlights the importance of user-friendly services in the logistics industry.