It refers to business that is solely into selling services or products to other business houses.

B2B or Business-to-Business activities can exist both online and offline in equal capacities. In online world, B2B is what it is commonly referred to as. The size of B2B markets is generally significant and is given more importance. It is often compared to B2C in terms of size alone. All said and done, B2B markets are known to be overcrowded sometimes. The volumes associated with B2B are far higher as compared to the volumes involved in B2C. This is because there can be many B2B transactions involved in any given supply chain of raw materials or sub components. The term B2B is widely used these days to refer a number of things.