An influencer is simply someone who has the ability to influence others. Brands pay an influencer, a type of social media marketing, to promote their product or service to their followers. The first form of influencer marketing was celebrity endorsements. In today's digital world, however, social content creators with niche audiences can frequently provide more value to brands. These smaller accounts frequently have highly engaged social media followers. A social media influencer is someone who wields power through social media. Influencer marketing occurs when you hire an influencer to promote your products or services.