what is us priority mail is a service offered by USPS that provides fast, affordable shipping within the United States. Priority Mail typically delivers packages in 1-3 business days, depending on the destination. USPS Priority Mail includes benefits such as tracking, insurance, and free packaging. It is one of the most commonly used services for businesses and e-commerce sellers due to its balance between speed and cost-effectiveness. Priority Mail also offers international shipping options for customers sending goods abroad.