whats first class

whats first class refers to USPS First Class Mail, which is one of the most affordable and widely used shipping services offered by the United States Postal Service. First Class Mail is ideal for lightweight packages and mail, such as letters, postcards, and small parcels weighing up to 13 ounces. It typically takes 1 to 5 business days for delivery, depending on the destination. First Class Mail is often used by individuals and businesses who need a cost-effective way to send non-urgent items. USPS also offers First Class Package Service, which is specifically designed for parcels.