Here is a definition from a Google search. “A business in which a distributor network is needed to build the business. Usually such businesses are also MLM or multi-level marketing in nature in that payouts also occur at more than one level. Network Marketing is sometimes also used incorrectly to indicate that the business uses a network of product suppliers in order to offer a broader selection of products. It is usually used this way to differentiate themselves as a way to suggest that their program is superior to other such programs.”

That is a mouthful indeed! I like to summarize the definition as “A business in which a distributor markets products or services and is paid on more than 2 levels of commission.”