The status icons
Status icons at the top of the screen give you information about Apple Watch:
Lets you know
You have an unread notification. Swipe down on the watch face to read it.
Apple Watch is charging.
Apple Watch is locked. Tap to enter the passcode and unlock.
Do Not Disturb is turned on. Calls and alerts won’t sound or light up the screen, but alarms are still in effect.
Airplane Mode is turned on. Wireless is turned off but non-wireless features are still available.
You have a workout in progress.
Apple Watch has lost the connection with its paired iPhone. This happens when Apple Watch isn’t close enough to iPhone, or when Airplane Mode is enabled on iPhone.
There’s wireless activity or an active process happening.