The subject of this paper is the role of social networks in market research on the example of Amazon. The aims of the paper are: define market research, explain the importance of social networks for business operations, explain the importance of social networks for market research, state the social networks that Amazon uses for the purpose of market research, explain how Amazon uses social networks for the purpose of market research. Over the years, market research has been conducted using various techniques, and the biggest change in gathering market-related information occurred with the development of social networks. Social networks have enabled companies to collect data on consumers, collect data on the level of satisfaction and consumer experiences, create communities through which they learn about consumers and their needs and wants, and monitor the competition. A company that has been successfully using social networks in business for years and practices conducting market research through social networks is Amazon. Amazon conducts market research by publishing various posts on social networks through which it obtains information about consumers, their habits and preferences; by means of algorithms on social networks, it monitors the behavior of consumers and the success of their activities on social networks; encourages social media users to interact with the business and create communities where Amazon gets information about what, how, when and why to do business. Thanks to the use of social networks for the purpose of market research, Amazon has over the years managed to develop a loyal relationship with consumers, got to know its consumers well, adapted products and services to the needs and wishes of consumers in time, made good business decisions in line with the events in the environment and resisted the competition.