E-commerce and m-commerce allow for the sale of goods and services through online and mobile channels. E-commerce includes B2B, B2C, C2B, C2C and P2P transactions conducted over the internet. M-commerce refers to transactions made via mobile devices and provides additional convenience for users. Both e-commerce and m-commerce provide benefits like flexibility and access to a wide range of options but also have limitations like infrastructure dependence and security/privacy risks.