AirTag is a small, coin-shaped tracking device created by Apple to help users locate small personal items like keys, wallets, and bags. Therefore, relying on AirTag as your primary car security system is not typically recommended, but it may be suitable as an intermediary security measure. It uses Bluetooth technology to connect with the user's Apple device and via tracking through the Find My app on iOS devices. This network allows users to locate their lost items with the help of nearby Apple devices that communicate their location anonymously.