What is a credit card annual percentage rate (APR)?

@montana 

A credit card annual percentage rate (APR) is the rate of interest charged on any unpaid balance on a credit card. It is expressed as an annual percentage and represents the cost of borrowing funds using the credit card. The APR takes into account the interest rate as well as any other fees and charges associated with the credit card. It helps cardholders understand the cost of borrowing and compare different credit card offers.