NFC (Near Field Communication) is a technology that allows devices to communicate wirelessly when they are close to each other, typically within a few centimeters. It is commonly used in mobile payments, enabling users to make transactions by simply tapping their smartphones against a payment terminal. NFC also facilitates data exchange between devices, such as sharing contact information or connecting to Bluetooth devices. This technology is found in many smartphones, smartwatches, and other electronic devices, making it a convenient option for quick interactions without the need for physical connections.