Network marketing, also known as multi-level marketing (MLM), has been a popular method of direct selling for decades. It involves a structure in which individuals earn commissions not only for sales they personally make but also for sales made by recruits they have brought into the business. This review article examines the principles, strategies, and challenges associated with network marketing. It explores the history of network marketing, its business models, ethical considerations, and the growing role of digital tools and social media in shaping the future of the industry. The article also discusses the controversy surrounding MLMs, highlighting both their potential and risks.