What defines an influencer? The Present: How much do influencers get paid? How do you become an influencer? What is more effective for advertising: macro-influencers or micro-influencers? The dark side of influencer marketingThe Past: The history of influencers — Ancient Rome, Coco Wine, Vaudeville, etc.Commercial: DinnerSmashThe Future: AI influencers, the future of human influencers, the shifting power of influencers