What does the Apple charging icon when you charge your watch mean?

This tells us that our Apple watch is charging. For more details about the product and the problem, the user can click the Apple Support and read everything over there.

Hi

The meaning of the symbols that are displayed on Apple Watch when it is charging are explained here, including in the first article under the heading "See if your Apple Watch is charging":

• If your Apple Watch won't charge or it won't turn on - Apple Support
• The status icons
• Check your battery and charge your Apple Watch - Apple Support