The Apple AirTag is a small, coin-shaped tracking device designed to help users locate personal items like keys, bags, or wallets. It connects to the Apple ecosystem via Bluetooth and can be tracked using the Find My app on iPhone, iPad, or Mac. Each AirTag emits a secure Bluetooth signal that nearby Apple devices can detect, allowing the location to be updated in real-time. Users can also enable features like Precision Finding, which uses Ultra Wideband technology for more accurate tracking, and set up notifications for when an item is left behind.