Have you got annoying ads in your status bar or shortcuts on the home screen? Where do they come from and how can I remove/optout/delete them?
In Jelly Bean, you can figure out exactly which app caused a notification. By long-pressing it on the notification bar you can select App Info. From here you can actually disable notifications on a per-app basis altogether.
Here is an example App causing annoying ads, with too much permissions:
Other options for removing ads, airpush etc. can be to download a detector app. AirPush Detector is one of them.