Over the past few months I have been hearing rumors of Amazon changing its ad program while at the same time I've been seeing indie titles show up in lock screen ads. All this activity signaled changes were coming, and today Amazon made it official.
A reader just sent me Amazon's new ad guide for authors (Thanks, Tom!).
The guide details lock screen ads, which are just now (officially) being made available to authors, explains how to use the ad campaign manager, and walks you through the new ways that authors can target ads for specific products. There's also a timeline explaining when the old product display ads are going to be retired.
Edit: Apparently I was misinformed; authors always had access to lock screen ads (my source was wrong).
I'm still reading the guide and getting feedback from experts, but it looks to me like Amazon just took about a third of what you learned in that course in Amazon ads last year and tossed it out the window.
It's a whole new ball game.