Who are the various intermediaries in a Digital Ad Tech Industry

The intermediaries in ad tech industry are as follows:

1) Publisher- These are companies who would play the ad e.g. Facebook, NBC etc

2) Supply side platform- Supply side platform allows publishers to manage their ad inventory and help them sell it e.g. AppNexus, Google Ad Manager

3) Media buyer- These are companies who want to buy ads e.g. Nike, Mcdonalds

4) Demand side platform- These platforms allow media buyer to buy ads e.g. Tradedesk, Doubleclick

5) Exchange- The exchange brings supply side and demand side platforms together e.g. EngineMX

6) Sometimes it happens the ad buyer wants a directed customer base e.g. customers in age range of 25-30 years based out of LA. In this case, they might use a platform called DMP. Data Management Platform e.g. Neilson