The following diagram shows the standard credit card processing flowchart in detail. Note that it is not essential to know every detail in steps shown in a red background color. These parts are executed on behalf of us by the payment system which we will use, so it is isolated both from the store and customer. For example, PayPal is such a system, which we will learn about now in detail.
Let's explain the flowchart step by step to clearly understand the whole process: