What is the difference between a payment gateway and a payment processor?

What is a Payment Processor? What does a Payment Processor do? What is a Payment Gateway? Do I have to use a Payment Processor? What is the difference between a Payments Processor and a Payment Gateway? Learn more from the Payments Professor. Full courses on electronic payments, RTP, FedNow, ACH, Same Day ACH, Faster Payments, and more available at www.PaymentsProfessor.com