The word publisher can conjure up many different things to different people. Some old-schoolers picture The New York Times or Condé Nast, while younger generations may think of digital-first publishers like Refinery29 or consumer-generated outlets like Reddit. However, anyone working in media and advertising knows that two largest “publishers” need to be taken into account. Together Google and Facebook dominate the lion’s share of viewers and readership, and, of course, the revenue from advertisers chasing those people.