Smartwatches are capable of displaying a variety of notifications like incoming calls, missed calls, text messages, e-mails, social media posts, appointment reminders, 
alarms and much more.

Many watches are fully customizable, allowing you to choose what notifications you receive, what’s displayed on the home screen, background picture, widgets and more. 
Do you want to receive a basic notification and view the rest of the content on your 
phone, or do you want to receive the full message on your smartwatch? Some devices 
will simply alert you of a notification with an icon, beep or vibration, while others can display the full message.

Similar to Bluetooth headsets, a few smartwatches allow you to make and receive phone calls directly through your device rather than just receiving an alert (provided it’s within wireless range of your smartphone).