Influencers are persons who are well-known and respected in a certain field. Victor Martin, for example, is a major influencer in the world of social media, much as Tristán Elósegui is in the area of web analytics and online marketing. These individuals have thousands of followers on social media, indicating that they have a large following in the community. As a result, if one of these influencers shared your material on social media or on her website, you would receive free promotion. To do so, though, you must first understand who they are.