Sale multilevel or mlm, that employs him, relationship marketing, marketing multi-level sales network by cooptation, co-opted network (V.R.C.) sales, network marketing, etc., in English multi level marketing or MLM, is a structure of the sales network in which resellers (or distributors) may sponsor new vendors, and be so partly paid by a commission assessed as a percentage on sales of recruits. Sale multilevel eliminates the costs of recruitment and training, but also advertising expenses by substituting the word-of-mouth.