whats the difference between first class and priority mail

whats the difference between first class and priority mail is a common question among people looking to ship packages through USPS. First-Class Mail is the most affordable option for lightweight packages, typically under 13 ounces. It provides basic service with a delivery time of 1-3 business days. On the other hand, Priority Mail offers faster delivery, usually 1-3 business days for domestic shipments, and includes tracking, delivery confirmation, and insurance for packages up to $50. While Priority Mail costs more than First-Class Mail, it’s often the preferred choice for heavier or higher-value items that require additional shipping benefits.