e-commerce is the ability to make purchases online, mostly business uses that form. And M-commerce is the ability to purchase products using any mobile devices. They all work hand in hand.
Medium. (2018). What is the Difference Between eCommerce and mCommerce?. [online] Available at: https://medium.com/magenative/key-differences-between-e-commerce-and-m-commerce-ecf880f6d261 [Accessed 8 Oct. 2018].