Launched in 7.1 Nougat, it activates automatically when it detects something wrong and blocks all apps
As Douglas Adams would say, Don’t Panic!. Let's bother the author of Galactic guide for hitchhikers to tell about the latest idea of Android, the panic button. According to XDA-Developers is Bleeping Computer, in Android 7.1 Nougat, the latest incarnation of the green robot, we find a feature that allows us to exit suspicious apps on the fly, those that we downloaded by mistake or that are behaving not exactly according to the canons.
It must be said that despite the nickname, in reality the anti-malware function does not have a dedicated button, but it does everything by itself and is activated when it detects that we pressed the back button several times. (at least 4). If you notice it, in fact, as soon as something is wrong our finger presses back I can't, Android understands that it must intervene and stops the running application and all the others, bringing us back to the Home from which we can disable the malicious app. In short, easy easy.