If you want to use PayPal for your payments go to > WPPayForms Pro > Settings > PayPal Settings and add in your PayPal email address
If you are selling subscriptions and recurring payments you will need to enable the PayPal IPN, information to do this is at the bottom of the PayPal settings page
If you are not using PayPal IPN then its recommended to also Disable the PayPal IPN verification
