Hey, thanks for commenting! The music typically used in ads (like video ads) can have a great impact on click-through-rates and conversion. So, by testing ads with different tracks by specific moods, we can find the right music that optimizes ads. We're currently testing this with a few private beta customers, so we'll see how it goes! :)
I can almost imagine a service that allows you to do multiple versions of your video ad, with script changes, various music, graphic styles, etc. and verify the rates.
If somebody ever runs with this idea - just let me know afterwards how much have I missed on?