Business-to-business is a complex of commerce transactions which occur between companies. The most common examples of B2B relations are transactions between manufacturers and wholesalers, wholesalers and retailers. The overall volume of business-to-business transactions surpasses the volume of B2C transactions, because a typical supply chain consists of many B2B transactions and only one B2C transaction. For instance, a smartphone manufacturer buys processors, modems, camera modules, and other necessary components to produce the mobile device. The number of transactions can range from few to dozens. But there is alway one final transaction – a finished smartphone is sold to the consumer.
Another area of B2B relations is communication and collaboration. Many B2C companies relies on social media to interact with their consumers, but social tools are also effective in business-to-business relations. In this situation B2B social media marketing takes place.