The process involved is very straightforward:
- Launch the Gmail application on your device or tab.
- Navigate to the message you’d wish to label.
- Click the 3 dots way up on the screen.
- Click “Change labels.”
- According to Techlector, this will lead you to a new screen. Tick the boxes of the labels you’d wish to add. Your labels will now be visible in the message. If you have chosen various colors for labels, these should reflect too.