Native Extensions for Adobe AIR are code libraries that contain native code wrapped with an ActionScript API. Native extensions provide easy access to device-specific libraries and features that are not available in the built-in ActionScript classes. Examples of native extensions include making a mobile device vibrate, integrating ad-networks and in-app purchasing systems into your games, and using the iOS Game Center in your iOS games.
Native Extensions for Adobe AIR are code libraries that contain native code wrapped with an ActionScript API. Native extensions provide easy access to device-specific libraries and features that are not available in the built-in ActionScript classes. Examples of native extensions include making a mobile device vibrate, integrating ad-networks and in-app purchasing systems into your games, and using the iOS Game Center in your iOS games.
Official documentation: http://www.adobe.com/devnet/air/native-extensions-for-air.html