Final answer:
The fastest growing form of e-tailing or e-commerce is m-tailing or m-commerce, which refers to mobile commerce.
Step-by-step explanation:
The fastest growing form of e-tailing or e-commerce is m-tailing or m-commerce, which refers to mobile commerce. With the widespread use of smartphones and tablets, more and more consumers are using mobile devices to make purchases online. Mobile apps and mobile-friendly websites have made it easier for consumers to shop on the go, leading to the rapid growth of m-commerce.