Offering subscriptions lets you sell products on a recurring basis. Depending on the subscription options you offer, your customers can choose to pay an agreed price for your product in a scheduled frequency. For example, you can offer subscriptions on a monthly, weekly, or daily basis.
If you have a subscription app from the Shopify App Store installed in your Shopify admin, then you can manage your subscriptions in the Shopify admin. When a customer purchases a subscription from you, the information about the product, and the frequency of the subscription, becomes visible in your admin. To set up subscriptions, you need to complete the set up in the app that you install.
Customer payment information is stored securely by Shopify. You can't access your customers' full credit card information after it has been entered.