A postal code is a series of letters, numbers, or both, assigned to specific geographic areas to facilitate the sorting and delivery of mail. Each code helps postal services identify the destination of a letter or package, ensuring it reaches the correct location efficiently. For example, in the United States, postal codes are known as ZIP codes, while in Canada, they are referred to as postal codes. Postal codes vary in format and length depending on the country. They can represent a single address, a group of addresses, or an entire region. By using postal codes, senders can improve the accuracy of their mail delivery and reduce the chances of delays or misdeliveries.