usps first class mail vs ground advantage

usps first class mail vs ground advantage compares two USPS shipping options for different types of deliveries. First-Class Mail is best for lightweight letters and packages under 13 ounces, with delivery in 1–5 business days. Ground Advantage is designed for heavier packages, offering slower delivery at a lower cost for bulkier items. While both services include tracking, Ground Advantage is generally better for shipments over one pound.