An ATM card is a plastic card issued by banks that allows customers to access their bank accounts through Automated Teller Machines (ATMs). Users can perform various transactions, such as withdrawing cash, checking account balances, and transferring funds. The card is linked to the user's bank account and requires a Personal Identification Number (PIN) for security. In addition to ATMs, ATM cards can also be used for purchases at some retail locations, depending on the card's features. They are a convenient way to manage money without needing to carry cash, making banking more accessible for many people.