When you work in MLM or multi-level marketing, you are part of a direct sales force in which representatives sell products or services for another company. Your responsibilities center around increasing revenue for the business by following a clearly defined sales strategy. Network marketing is often a part of your duties, as well. Your income is based on sales and bonuses in this line of work, with companies often offering compensation for a new employee referral. Beware of MLM pyramid schemes when job hunting. Not every MLM company is a pyramid scheme, but some startup companies attempt to take advantage of potential salespeople.