The Android Composite ADB Interface (SKY) Windows driver is a device driver used to enable communication between your Android device and a Windows computer over USB, primarily for debugging and development purposes. ADB stands for Android Debug Bridge, which is a versatile command-line tool that allows developers to interact with Android devices, install applications, run shell commands, and more.

The SKY part of the name usually refers to a specific hardware or chipset manufacturer for Android devices. It could be related to the specific model of an Android device or a particular brand (e.g., "SKY" might refer to the manufacturer or the chipset supplier). However, the core function of the driver is still the same: enabling USB debugging and ADB functionality between the device and the computer.