Contactless cards are payment cards that allow users to make transactions without physically inserting or swiping the card. Instead, they use radio frequency identification (RFID) or near-field communication (NFC) technology to transmit payment information when held near a compatible payment terminal. This makes transactions faster and more convenient, especially for small purchases. To use a contactless card, simply tap it on the terminal, and the payment is processed almost instantly. These cards are widely accepted at many retailers, restaurants, and public transport systems, enhancing the overall shopping experience while maintaining security through encryption.