💳 A bank card, commonly known as a debit or credit card, is a plastic payment card issued by a financial institution that allows individuals to make electronic transactions and access their funds. It typically bears the logo of a payment network such as Visa, Mastercard, or American Express and contains a unique card number and security features like a chip or magnetic stripe. Bank cards provide a convenient and secure way for people to make purchases, withdraw cash from ATMs, and manage their finances digitally.