Gmail Ads targeting
It's great to see that Gmail sponsored promotions are now available.
But how do I setup a Gmail ad?
I've followed the directions here:
When I'm on the Campaigns > Display Network > Targeting page, I add mail.google.com to the placement, but no matter what word I type into the keyword box, I always get an available impressions estimate of 0-1K/week.
So 2 questions:
1) How do I get an accurate impressions estimate?
2) How do I target by subject line or domain name of the sender?