A credit card is a plastic card issued by financial institutions that allows individuals to borrow money to make purchases. Users can spend up to a predetermined limit and are required to pay back the borrowed amount, usually on a monthly basis. Interest may be charged on any unpaid balance, making it important to manage spending wisely. Credit cards often come with various features, such as rewards programs, cashback offers, and travel benefits. They can also help build a credit history, which is essential for obtaining loans or mortgages in the future. Responsible use of a credit card can enhance financial flexibility.