Mail delivery is the process of transporting letters and packages from one location to another. This service is typically provided by postal services, such as the United States Postal Service (USPS) or Royal Mail in the UK. Mail is collected from various drop-off points, sorted at distribution centers, and then delivered to recipients' addresses by mail carriers. The delivery process can vary based on the type of mail service chosen. Standard mail may take several days to arrive, while express services offer faster delivery options. Additionally, tracking systems allow senders and recipients to monitor the status of their mail during transit.