Influencer marketing as part of the advertising industry has grown significantly in recent years, becoming one of the most popular and effective forms of online advertising. The fast-growing market of influencers comes with potential risks for consumers and creates several challenges for regulators. This study provides information and analysis on the impact of influencers on advertising and consumer protection in the Internal Market, identifies best practices and makes recommendations for future action. This document was provided by the Policy Department for Economic, Scientific and Quality of Life Policies at the request of the committee on Internal Market and Consumer Protection (IMCO)