From The Apple Wiki

iAdInternalSettings allows for configuration of several debugging and logging settings for iAd.

There are dozens of options in this bundle, mainly to enable logging for certain iAd processes. This page will only cover features not related to logging.

Ad Server

The bundle allows you to change the server that iAd fetches ads from.

Miscellaneous Settings

  • Clear Cache Before Load - Clear the URL cache before loading an ad.
  • Fast (60s) segment refresh - Refresh segments faster.
  • WebKit Accelerated Drawing - Use WebKit to draw elements faster.
  • Demo Mode (Internal App) - Enables Demo Mode in iAdDemo.
  • Ignore Match Status - Unknown.