What is Publisher in google analytics ?

[ImpalaWardrobe]

What is Publisher in google analytics ?

[Servers Base]

Google is adding a new Publisher Reporting section in Google Analytics that includes AdSense and Ad Exchange reports.
AdSense reports will now be in the Publisher section under Behavior. Google says the Ad Exchange integration will provide reporting for those publishers that aren’t backfilling ad inventory with Ad Exchange through DoubleClick for Publishers (DFP).

[RH-Calvin]

The Google Publisher Tag (GPT) is an ad tagging library for Google Ad Manager that can dynamically build ad requests. GPT takes key details such as ad unit name, ad size, and custom targeting, builds the request, and displays the ad on web pages.