What is Strictly Enforced Verified Boot in Android 7.0 Nougat?

As far as security is concerned, Google is going very strict with the newest version of its mobile operating system.

Until now, Google has not done more than just alerting you of the potential threats when your Android device runs the check as part of the boot process.

Android Marshmallow 6.0 does nothing more than just warning you that your device has been compromised, though it continues