what is the difference between 1st class and priority mail

What is the Difference Between 1st Class and Priority Mail – First Class Mail and Priority Mail are both services offered by USPS, but they differ in delivery speed, cost, and features. First Class Mail is generally used for lightweight packages and letters, offering delivery within 1-3 business days. Priority Mail, on the other hand, is faster, typically delivering packages within 1-2 business days, and includes tracking and insurance up to a certain value. Priority Mail is ideal for heavier or more valuable items.