Ecommerce, as the name implies, is the process of initiating, carrying out and completing commercial transactions online or via the Internet. It allows for the trading of goods and services over the Internet and other computer networks by enabling traders to offer their goods and services online and accept payment through credit card processing services in the UK.

Ecommerce allows potential buyers to not only view the goods and services available online but also make payments for their purchases over the Internet. The payment gateway is an online application interface that authorises payment to traders for their goods and services through the use of credit cards, bank cards and mobile money processing services. It, therefore, forms the link between the person making the purchase or the shopper and the person receiving the payment or the merchant. In simple terms, if you buy or sell something using the Internet then you are involved in eCommerce.