Canvas Page URL: The Canvas Page URL field is now auto-generated from the App Namespace. App Namespace is the short app name appended to apps.facebook.com (e.g.,
apps.facebook.com/YOUR_APP_NAMESPACE) to create the Canvas Page URL.
Basically, it's like your application name. If your app name is Test App, then you may want to have your namespace be testapp.
-Melissa
Autotune
