Which of the following statements is true about Standard Post?

The statement about Standard Post being not required to be mailed as first class or periodicals is true because Standard Post, now known as Retail Ground service under USPS, is a cost-effective way to ship packages that do not meet the criteria for First-Class Mail or Periodicals. This service is specifically designed for items that may be heavy or bulky, offering a reliable option for shipping without the restrictions of requiring first-class or periodical mailing standards.

This means that Standard Post can serve a variety of shipping needs, particularly for parcels that are not time-sensitive, allowing customers flexibility in their mailing options. It caters to a range of items, thereby providing a more economical choice for sending goods that do not require expedited service.