Magisk APK works in a very smart and safe way compared to old rooting methods. Earlier, rooting tools used to modify system files directly, which could cause problems. But Magisk works differently using a systemless approach. When you install Magisk APK, it modifies the boot image instead of changing the system partition. The boot image is responsible for starting your device. By making changes there, Magisk gets control over the system without touching important files.