What distinguishes first-class mail from standard mail?

First-class mail is distinguished by its prioritization and typically faster delivery compared to standard mail. This service is designed to ensure that items such as letters, postcards, and small packages are delivered more quickly, often within one to three days, depending on the destination. The emphasis on speed and reliability is a key characteristic of first-class mail, making it a preferred choice for important correspondence and time-sensitive materials.

In contrast, standard mail, often referred to as marketing or bulk mail, is generally used for advertisements, newsletters, and other non-urgent communications. While it is more economical for sending large volumes of mail, it does not offer the same level of prioritization or speed in delivery. This distinction in service quality and delivery expectations is what sets first-class mail apart from standard mail.