How do payment fields work?

For example, you integrated your form to PayPal. Once the user submitted the form, he or she will be redirected to the PayPal check out page. The user will enter his/her PayPal credentials and proceed with the payment.

Please refer to these guides:
https://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form
https://www.jotform.com/help/49-Order-Form-Types
https://www.jotform.com/help/323-Mastering-Payment-Form-Integrations-with-JotForm

If you have any questions, let us know. Thank you.