Earlier - promoted at 1.30pm AEST (but actually airing an hour earlier, at 1.30pm AEDT) was a webinar run by Google AdSense with two AdSense partner companies presenting.
The topic was viewability, which I found quite interesting. You should strive for at least 50% viewability to get the bigger advertisers, apparently; and viewability is directly related to your earnings.
There's some interesting data in the middle, showing a few tests relating to ad placement. If you have a good-performing ad in the right place, it's better in terms of revenue than a few poorly-performing ads in different places. The best way to earn from mobile, it seems, is a medium-rectangle that displays on the page fold. Very interesting to see; I've changed my ad placements as a result. We'll see how they work.
The full webinar is here: [
youtube.com...]