The evolution of social media and digital marketing has led to influencer marketing. Influencers are indivduals who influence others. Additionally they are used as a promotional tool for numerous products and services via social media. For brands it is really important to choose the right influencer for its promotional activities, as costumers unknowingly associate the chosen influencer with specific products. Influencers can be placed into many categories, such as by the content or by the number of followers that they have. Having a lot of followers doesn't necessarily mean good engagement rate as large influencers rarely interact with their audience. The aim of this research was to research the impact of influencers on young people. First part of the reseacrh (chapter) was focused on social medias and their role in our lives. Second part explained what is influencer marketing and importance of influencers. Third part was about consumer behaviour and their purchasing decionions. Empirical part of the research focused on the results of the questionnaire which was filled out by 225 people and whose results were processed in IBM SPSS statistical programme using descriptive statistics methods. Results showed that influencers do have an impact on young people, like it was expected and elaborated in the theory part of the research.