On the payment confirmation page, the customer will be prompted to enter their credit card info again and perform any additional actions required by Stripe, such as "3D Secure" confirmation. After confirming their payment, the user will be redirected to the URL provided by the redirect parameter specified above. Upon redirection, message (string) and success (integer) query string variables will be added to the URL.
Alternatively, you could allow Stripe to handle the payment confirmation for you. In this case, instead of redirecting to the payment confirmation page, you may setup Stripe's automatic billing emails in your Stripe dashboard. However, if a IncompletePayment exception is caught, you should still inform the user they will receive an email with further payment confirmation instructions.