what is first class usps

what is first class usps is a service provided by the United States Postal Service (USPS) for sending mail and small parcels. First-Class Mail is typically used for sending letters, cards, and small packages weighing up to 13 ounces. It offers fast delivery (usually 1 to 3 business days) at a relatively low cost. First-Class Mail also includes tracking services, making it a popular option for personal and business correspondence, especially for those needing affordable yet reliable delivery.