what is first class mail

what is first class mail is a service offered by the United States Postal Service (USPS) that allows for the delivery of lightweight mail items, such as letters, postcards, and small packages. First Class Mail is one of the most affordable options for sending mail within the U.S., and it includes delivery times of 1-3 business days, depending on the distance. For packages, First Class Mail can accommodate parcels weighing up to 13 ounces, making it an ideal option for small businesses or individuals who need to send lightweight items quickly. This service also includes basic tracking, but it does not offer guaranteed delivery times.