This feature is the integration of the Realex payment option into a store as its primary payment gateway, enabling its customers to purchase with ease. Realex is a leading UK online payment gateway that provides real time web processing for online merchants looking to take credit card and debit card payments for their website. Please note that you're required to set up an account with Realex to enable functionality of this feature, and also need a merchant account to be able to accept payments. Your store can only be integrated with one primary payment gateway at any time.
For more information about Realex, please go to http://www.realexpayments.co.uk.