priority shipping vs standard refers to two different shipping methods with varying delivery speeds and costs. Priority shipping is a faster service, typically offered by USPS, UPS, and other carriers, which guarantees delivery within 1-3 business days. Standard shipping, on the other hand, is a more economical option that can take anywhere from 3 to 10 business days, depending on the destination. While priority shipping is ideal for urgent deliveries, standard shipping works well for less time-sensitive packages.