whats priority mail refers to a USPS shipping service that offers faster delivery times compared to First-Class Mail. Priority Mail provides reliable and affordable shipping for both domestic and international packages. It guarantees delivery within 1 to 3 business days, depending on the destination, and includes free tracking, delivery updates, and up to $50 in insurance coverage. Priority Mail is a preferred option for businesses and individuals who need to send packages quickly and securely. Additionally, Priority Mail Flat Rate boxes allow customers to ship items at a fixed price, regardless of the weight or distance, making it a cost-effective choice for heavier packages.