difference between first class mail and priority mail

difference between first class mail and priority mail is an important distinction for anyone looking to ship packages via the U.S. Postal Service (USPS). First-Class Mail is the most economical option for sending letters and small parcels weighing up to 13 ounces, with delivery usually within 1 to 3 business days. On the other hand, Priority Mail is faster, offering delivery in 1 to 3 business days for parcels weighing up to 70 pounds. Priority Mail also includes features such as free tracking and insurance for shipments, making it a preferred option for higher-value items.