what is ground advantage is a shipping option provided by USPS that offers a balance between cost and delivery speed for packages. USPS Ground Advantage is an affordable ground shipping service for domestic deliveries and is suitable for larger or heavier packages that do not require expedited delivery. It offers reliable delivery within a 2-8 business day timeframe, depending on the destination, and includes package tracking. Ground Advantage is an ideal choice for those looking to save on shipping costs without sacrificing service quality.