This episode of NPR's Life Kit provides a guide to understanding and navigating the world of credit cards and credit scores. Host Marielle Segarra, along with experts John Kiernan and Yanely Espinel, explain credit card fundamentals, including APR, interest accrual, statement balances, and minimum payments. The podcast offers actionable advice such as understanding credit card terms, disputing unrecognized charges, and strategies for managing debt, like balance transfers. It emphasizes the importance of using credit cards responsibly to build credit and take advantage of rewards while avoiding high-interest debt, providing listeners with the knowledge to make the credit card system work for them.