A Smart Card is a small, portable device that resembles a credit card but contains a microprocessor or memory chip. This chip stores and processes data, allowing the card to perform various functions, such as making secure payments or accessing information. Smart cards are commonly used in banking, transportation, and identification systems, providing a convenient and secure way to manage transactions. These cards can be contact-based, requiring insertion into a reader, or contactless, allowing users to simply tap the card near a reader. With the rise of digital security, smart cards are increasingly popular for protecting sensitive information, making them essential in today's technology-driven world.