Anyone familiar with online shopping (and that's around 80% of the population) knows that making a purchase online is normally pretty simple. Shoppers add the goods or services they want to buy to a shopping cart, check out when they are ready to pay and then enter their payment details. Of course the underlying technology is not so simple. You won't need to understand the technical detail of how an e-payment is processed, but it's worth getting to grips with the basics: How does your website link to the payment processor (such as PayFast and PayPal)? How do you get your hands on your online trading profit?