A postage stamp is a small, adhesive piece of printed material designed to mark correspondence, indicating that the requisite fees for mailing have been paid. Historically, the design and production of these stamps evolved with the technological advancement of communication networks. They are manufactured using specialized printing processes, often utilizing various inks and secure paper substrates, and are typically affixed with a gummed backing. The value printed upon the stamp represents the cost of a standardized communication service rather than the intrinsic worth of the paper itself. The enduring function of the stamp remains to provide verifiable, uniform proof of prepaid transport services, making it a physical artifact rooted in the history of global logistical technology.