NFC, or Near Field Communication, is a technology that has rapidly grown in popularity due to its versatility and ease of use. It enables wireless communication between two devices that are close to each other, typically within a few centimeters. This technology is widely used in various applications, from payments to access control, and has become an integral part of modern smart cards and business cards. In this article, we will explore what NFC is used for, particularly in the context of NFC cards, NFC business cards, and smart business cards.