As for why you might want to use Waze, the app displays real-time traffic conditions and directions like many other navigation apps. But it also lets users add information from trips, so you can see information on construction, road hazards, speed traps and gas prices from one app. Besides that, it can be nice to have an option for navigation besides the ones provided with the car or the phone.
Waze compatibility will only be available on Fords equipped with Sync 3 version 3.0. New Fords will already have this, and older Fords with Sync 3 will just need a software update to access the new feature. Using Waze on the infotainment screen also uses Ford's AppLink system, which only works with iOS devices. Android users shouldn't despair though, since Sync 3 also supports Android Auto, which already allows you to use Waze on the car's screen. So now you can pick from Ford's navigation, Apple Maps, Google Maps, or Waze for your navigation needs.