While making the payments, a customer is directed to the payment page and not out of your website. Here, a Post form is used once one clicks on a payment link/button. The payment page is maintained securely by the payment gateway. After all details about credit card and other required fields are complete, the user fully gets back to the main website. The main benefit is that one does not get away from your website thus fast and easy to use. Example of a gateway is eWay.