Also called pyramid selling or network marketing, multi-level marketing companies grow revenue by hiring and recruiting non-salaried employees referred to as distributors, influencers, consultants, salespeople, or promoters (among other names). In other words, employees generally receive compensation from performance through a pyramid-shaped compensation system.
"Network marketing" and "multi-level marketing" (MLM) have been described by author Dominique Xardel as being synonymous, with it being a type of direct selling.[6] Some sources emphasize that multi-level marketing is merely one form of direct selling, rather than being direct selling.[23][24] Other terms that are sometimes used to describe multi-level marketing include "word-of-mouth marketing", "interactive distribution", and "relationship marketing". Critics have argued that the use of these and other different terms and "buzzwords" is an effort to distinguish multi-level marketing from illegal Ponzi schemes, chain letters, and consumer fraud scams.[25] 

Sales agents in MLM companies frequently work for commissions on sales. In addition, MLM agents typically get commissions on the sales of their “downstream.” Sales agents are able to recruit new sales agents into their “downstream,” and those sales agents can recruit new agents as well. An MLM sales agent usually makes money from each sale in their “downstream,” creating a form of passive income.