Final answer:
Mobile commerce is the use of applications on portable computing devices to buy and sell products.
Step-by-step explanation:
Using applications on portable computing devices to buy and sell products is known as mobile commerce. Mobile commerce, or m-commerce, refers to the process of conducting financial transactions through a mobile device, such as a smartphone or tablet. It allows users to make purchases, check product prices, compare reviews, and even complete transactions on-the-go.