APR stands for the 'Annual Percentage Rate'. It is the total cost of the loan expressed as an annual percentage rate.
APR acts as a standardised way to show the cost of borrowing over a yearly period to allow you to compare the cost of products from different lenders (for example, comparing the same loan amount for the same loan period). It takes into account both the interest you are charged and any other fees or charges relating to the loan. APR tells you how much the loan will actually cost.