The marketing of goods and services to business customers that need them to enable their production of goods and services. A business my purchase goods and services that are:
1) part of the products/services they make and sale (i.e., BMW buying auto engines), or raw materials such as shoe leather
2) resold such as when Ford purchases Nissan cars and puts their name plate on them.
Value-added resellers take a product and modify it for a customer (i.e., IT consultants buy software then modify it for resale, such as Protiviti buying SAP software and customizing it for resale
3) in support of their operations (i.e., consumables such as copy paper and hand soap)