How to repay credit card debt?

— In a single payment. This can be done both during the interest-free period and after it. Interest will be minimal

— In installments larger than the minimum payment. It is best to repay the full amount during the grace period. Once it ends, interest will start to accrue

— With minimum payments. In this case, the interest will be the highest

If there is no debt on the credit card, you do not need to pay anything.