A social media influencer is a person with the power to influence or cause others to make purchase decisions because of his or her position in authority, knowledge or relationship with the audience.
Most social influencers have a following in particular niches where they are active. The number of followers depends on the size of the niche as well as his or her influence. Social media influencers have such a high reputation that their posts on particular topics generate large followings of enthusiastic social media users. Social influencers are able to start trends and influence the choice of products that their followers pick.