An ATM card is a plastic card issued by banks that allows customers to access their bank accounts through Automated Teller Machines (ATMs). With an ATM card, users can withdraw cash, check their account balance, and perform other banking transactions without needing to visit a bank branch. To use an ATM card, customers insert the card into an ATM, enter their Personal Identification Number (PIN), and select the desired transaction. ATM cards are convenient and provide a secure way to manage money, as they often come with features like fraud protection and transaction alerts.