A payment gateway is a technology used to capture and transfer the payment data from the customer to the acquirer and then transfers the payment acceptance or decline back to the customer.u003cbr/u003eu003cbr/u003eActing as an interface between the merchant's website and its acquirer, a payment gateway validates the customer's card details securely, ensures that the funds are available, and allows merchants to get paid.u003cbr/u003eu003cbr/u003eOperating as the middleman between your customer and the merchant, a payment gateway ensures that the transaction gets carried out securely by encrypting sensitive credit card details.