Unlike online banner and text advertising. Apple’s iAds don’t link out to another website. Instead they act as micro-sites hosted by Apple and served within the app you are in.
These micro-sites include information, videos, games, in-ad purchases and any other interactive features you can come up with using HTML5.
Apple calls it: “Emotion + Interactivity”.

Combine the demographic data Apple has on us with the credit cards they have on file and this will be a very powerful new advertising option, particularly on mobile devices where search advertising doesn’t really work.