I checked my publisher referral date in Google Analytics and the data (primarily Adsense) shows a big difference in "Publisher monetized pageviews" and "publisher impressions"
It seems like I'm losing a huge chunk of revenue there. Or am I missing something? Is it possible to passback to a different network through dfp for these unmonetized pageviews?
It's isn't just you.
Adobe reported that "over $21.8 billion in global ad revenues have been blocked/lost so far in 2015." largely thanks to mass adoption with the AdBlocking software :) 21 million users in 2009, to 198 million active global users as of June 2014-likely overtaking the other comps entirely.
Impressions are TOTAL ad views. If you have 3 ads on a page, you will have 3 impressions.
If user sees only two ads (say one is at the bottom of the page, and user doesn't scroll down), you will have 2 impressions.
Page views is how many times a page was seen.