Which service is included in the Postal Service's shipping services that competes with other delivery companies?

Priority Mail is a key service offered by the Postal Service that competes with other delivery companies such as UPS and FedEx. This service is designed for faster delivery options, offering delivery within 1 to 3 business days depending on the destination. Priority Mail includes features such as a flat rate option, tracking services, and insurance up to a certain value, making it a convenient choice for customers who need reliable and timely package delivery.

In contrast, the other services listed primarily have specific use cases or restrictions that do not cater to the same general audience looking for competitive shipping solutions. Media Mail is intended for the shipping of educational materials, Library Mail is specifically for library-related items, and Bound Printed Matter is designed for certain printed materials, often with specific weight and size limitations. These services do not compete directly with general parcel delivery like Priority Mail does.