A Discover credit card can offer a promotional interest rate of 0% for a certain period, such as through April 2022. You will not be charged any interest on your credit card balance for the promotional period. However, it is important to note that this offer may only apply to new purchases and not to balance transfers. If you want to transfer a balance from another credit card to your Discover credit card, you may be charged a balance transfer fee and a regular interest rate on the transferred balance. It is a good idea to carefully review the terms and conditions of any credit card offer before you accept it to make sure you understand the fees and interest rates that will apply. If you have any questions about a particular credit card offer, I recommend contacting the issuer directly for more information.