MLM is a business model in which one person recruits others to sell a product and receives a share of their profits, or a business that is run in this way. MLM is an abbreviation for 'multi-level marketing'. [business]
MLM is legal provided you have a real product to sell.
Social media means MLM presenters now sell to – and recruit from – the entire world.
While some MLMs are legitimate, others are thinly veiled pyramid schemes.