B2B (buissness-to-buisness) means a transaction form between two businesses unlike B2C (business-to-customer). An example of B2B transaction is Apple buying semiconductors from Intel. In this case, Intel is a manufacturer and Apple is wholesaler, but none of them is the end buyer or user.

Typically, B2B transaction is a part of a supply chain, one company supply another with raw materials to continue the manufacturing process.