Ogone has multiple payments methods. One of them is a Checkout-module. Besides an Ogone account you need e.g. Paypal, CreditCard accounts. Ogone will just intergrade them in one (secure) environment. One of the nice things is a feedback to your website. If the customer does pay, but the response to your site is lost, the order will be updates offline. Ogone will send an update to your site, by using a specific url.