In this digital era, people no longer carry cash around with them. Instead, they use their smartphones to make payments. For instance, you can buy something in a store and pay for it using your smartphone. You don’t need to carry any cash around with you. This is also true for online transactions. You don’t need to download any special apps or register any accounts. You just need to have your smartphone and you’re good to go.

This is also applicable to online food orders. You can order food online and pay for it using your smartphone.