Apple AirTag Review: Finding Lost Items Made Simple On 5/16/21 at 6:00 AM EDT AirTag is a small white disc meant to track personal items such as keys and luggage. TYLER HAYES The idea with an AirTag is simple: Attach it to something you might lose. If you do misplace the item, you can use the Find My app to locate it again. This type of Bluetooth tracker isn't new though; in fact, in technology-years, it's quite old. Apple is following the lead of other companies, including Tile, in its creating a similar tracking product. But, the important question here is, How does AirTag work?