While we are online shopping, we will pay by credit card rather than cash. When we purchase in physical shopping, we must take out the credit card to the sales. If we forget to bring any credit card, we cannot shopping.
As technology advance, there are new technology that can pay by the devices and it does not need to take out the credit card. Apple Inc. has launched a digital wallet service which called Apple Pay in recent years.
Apple pay is an easier way to pay in a store and work with the devices that we use everyday. We don't actually need to open up any apps nor any signal for it to work. Just add the credit card to Wallet of the Apple devices and it can use immediately. Also, it is technically more secure than an ordinary transaction, and much more convenient.