To accept payments online, your website has to be connected to a Payment Gateway, which encrypts and sends your shoppers' payments for authorisation.
In turn, the Payment Gateway is connected to a Merchant Account - a bank account specifically for processing credit and debit card orders.
WorldPay can offer a Merchant Account combined with payment processing in a complete package. Have a look at Business Gateway Plus for more information.
This section takes you through everything you'll need to do to enable your website for online payment as well as apply for, and connect to, WorldPay's service: