Also commonly referred to as the “the payment processor used to handle transactions on your ecommerce store, your payment gateway can be either on-site or off-site, depending on what works best for your model.,” this is the platform that processes payments for online purchases. This term also applies to regular A business that has a physical store that customers can go to rather than just having an online presence. stores that process credit card payments. The gateway processes the transfer of data from the user’s bank to the website for the Purchasing an order online from a business or other seller. to occur.