E-commerce is divided into several categories such as:
B2B (Business to Business): Participants in e-commerce activities are usually large enterprises / companies. Understandably, buyers and sellers in this model are businesses.
B2C (Business to Consumer): Participants in e-commerce activities include merchants are businesses and buyers are consumers (customers).
C2C (Consumer to Consumer): Participants in e-commerce activities include individuals, i.e. buyers and sellers are individual business individuals.
There are also G2C (Government-to-Citizen), G2B (Government-to-Business) … but these forms are less popular, also less used.