Credit cards are financial tools that allow consumers to borrow funds from a pre-approved limit to make purchases or withdraw cash. They are widely used for their convenience and the ability to earn rewards, such as cashback or travel points, on spending. Users are required to pay back the borrowed amount, often with interest, if not paid in full by the due date. These cards come with various features, including credit limits, interest rates, and fees. Responsible use of credit cards can help build a positive credit history, while misuse can lead to debt and financial challenges. Understanding the terms and conditions is crucial for effective management.