what is first class postage

what is first class postage refers to the USPS service used to send letters, postcards, and small parcels. First-Class Mail is the most economical postage option for items weighing up to 13 ounces. This service offers delivery within 1-3 business days depending on the destination. First-Class Mail is commonly used for personal letters, invitations, and small business mailings. It is an affordable and reliable choice for customers looking to send lightweight mail with fast, dependable delivery.