Find my iPhone app gives you the ability to sign in from any iOS iPhone, iPad, iPod, Mac or browser and track your device location if you misplaced it, Find my iPhone app includes Activation Lock that prevents anyone from using your device, it also gives you some features that can be remotely activated as the following:
Find my iPhone app Features?
- Play sound for two minutes at the full volume even if the misplaced device is set to silent.
- locate your device on the map.
- Remotely manage your personal data as you can erase it all from the device for the security reason.
- It allows you to display a custom message on the device screen.
- Remotely Lock your misplaced iPhone, iPod, iPad with a passcode.
- So we recommend you to enable it.
Credit: Apple