This is the equivalent of a "kill switch" for your machine's wireless communications. The script operates at a lower level than the standard rfkill command by directly interacting with the /sys filesystem, providing a more robust and granular method to ensure the devices are physically disabled, not just in a software-off state. It is a tool to be used on sensitive operating systems to physically isolate a machine from the airwaves.
Protecting against WiFi Kill tools involves understanding how to secure a network against ARP poisoning. wifi kill github