Read how a smartwatch works, what a smartwatch can do, and what you can use it for here.
To use a smartwatch, you need a smartphone. On your smartphone, you install the app that comes with the smartwatch, such as Android Wear or Watch from Apple. By opening the accompanying app on your smartphone and turning on Bluetooth, you can synchronize the watch with your phone. Now your devices are connected and you will receive notifications from your smartphone on the screen of your watch. For example, you can read emails and messages, view your calendar appointments, or take phone calls. That's useful, because you no longer have to worry about missing an important message.