Can you explain how an unsecured credit card works?

An unsecured credit card is a type of credit card that does not require any collateral or security deposit. When you use an unsecured credit card, the card issuer extends you a line of credit that you can borrow against. You can make purchases with the card up to the credit limit, and you are required to repay the borrowed amount, usually with interest, by the due date. If you do not pay the full balance, you will be charged interest on the remaining amount.