A credit card is a small plastic card that extends a line of credit or a temporary loan any time a consumer uses it to make a purchase. If the loan or charge is paid back within a specified grace period usually between 25 and 30 days then you don’t have to pay anything above and beyond the amount you initially charged; it amounts to a short-term, interest-free loan. Credit cards are not only important for individuals and businesses; they're an important aspect of continued economic growth. Credit cards can be an extremely helpful tool in an emergency situation such as unexpected hospitalization due to an accident. You can use your card to pay for the medical bill first. So it's customer choose and willingness to choose your perfect card.