what is the difference between priority mail and first class

what is the difference between priority mail and first class concerns the distinctions between two USPS shipping services. Priority Mail is typically faster, offering delivery within 1–3 business days, and includes tracking and insurance. It is best suited for heavier packages and time-sensitive shipments. First-Class Mail, on the other hand, is more economical and ideal for lightweight items such as letters, postcards, and small parcels. It usually takes 2–5 business days for delivery. Choosing between the two depends on package weight, delivery urgency, and budget.