Priority stamps are postage stamps used for sending mail through USPS’s Priority Mail service. These stamps allow customers to send packages and letters with expedited delivery, typically within 1 to 3 business days, depending on the destination. Priority Mail offers tracking, insurance, and a range of box sizes, making it ideal for businesses and individuals who need reliable and fast shipping. Priority stamps can be purchased at post offices or online, and they can be used for both domestic and international shipments.