what is the difference between priority and first class mail

what is the difference between priority and first class mail refers to the comparison between two different USPS mailing options. Priority Mail is faster and more expensive than First Class Mail. Priority Mail offers delivery within 1-3 business days, comes with tracking, and includes $100 of insurance coverage for most shipments. First Class Mail, on the other hand, is designed for lighter packages, such as letters, postcards, and small parcels, and offers delivery within 1-5 business days. Priority Mail is typically preferred for larger, heavier packages, while First Class Mail is ideal for lightweight shipments.