Where is credit card infomation stored?
Your customers' credit card numbers and security codes are never stored on your WooCommerce website. This means that you don't have to meet the burdensome and expensive security standards required for storing credit card information.
The only information stored on your site related to the cards are tokens. A token is an anonymous and secure representation of the card, which you provide your payment provider to make charges to the card. The card's actual data is stored remotely by your payment provider, who can match the card with the token when necessary.