Mailing refers to the process of sending letters, packages, or other items through a postal service. This service allows individuals and businesses to communicate and deliver goods across various distances. Mailing can involve different methods, such as standard mail, express delivery, or international shipping, depending on the urgency and destination of the items. The postal system, often managed by government agencies like the United States Postal Service (USPS) or Royal Mail in the UK, provides the infrastructure for mailing. Customers can purchase postage, which is required to send items, and track their shipments to ensure they reach their intended recipients safely and on time.