This document discusses influencer marketing. It defines influencer marketing as brands promoting their products through endorsements from influencers on social media. It notes that influencer marketing relies on influencers who have trusted followings in a niche. It outlines that influencer marketing has grown hugely popular as digital media has expanded and discusses how influencer marketing has evolved over time. It also predicts that influencer marketing will continue growing as more people become influencers and there are more opportunities to find influencers for specific target audiences.