Top influencer marketers describe 3 big challenges facing the industry

E.l.f. Beauty hosted an influencer activation at Coachella.VALERIE MACON / AFP via Getty ImagesInfluencer marketing can be messy and unpredictable.We asked top creator marketers about the main challenges they face when running campaigns.Marketers said choosing talent, approving content, and forecasting reach create the most headaches.Influencer marketing has ballooned into a $12 billion industry in the US. And yet, running campaigns can still feel unpredictable.Business Insider asked more than a