whats first class postage

whats first class postage refers to USPS’s First-Class Mail service, which is the most economical option for sending lightweight letters, postcards, and small packages within the United States and internationally. First-Class postage is designed for non-urgent mail and provides reliable, low-cost delivery. It includes tracking for packages but not for letters, and it is generally delivered within 1-3 business days for domestic shipments. International delivery times vary based on the destination.