Why is processing mail according to postal service protocols critical?

Processing mail according to postal service protocols is critical because it ensures operational efficiencies. These protocols are designed to streamline various tasks involved in mail handling, from sorting to delivery, which allows the postal service to operate smoothly and effectively. When procedures are followed accurately, it reduces the likelihood of errors, prevents delays, and optimizes the use of resources. This leads to timely deliveries and improved customer satisfaction, as customers receive their mail and packages as expected.

In relation to the other options, while minimizing package sizes could be beneficial, it is not a primary reason for processing mail according to protocols. Increasing the variety of postal products, though important for meeting customer demand, does not directly relate to the core efficiency and operational goals of mail processing. Similarly, although customer service is crucial, the primary focus of adhering to processing protocols is enhancing the efficiency of the entire mailing system rather than providing additional time for service.