A setup dialog box will appear, now check the available sorting tab names that Gmail provides. After the selection is complete, press "Save" to save and activate them.
Enable Category Tabs for Gmail web background Picture 2
A small message will appear on the screen with information about how to use the Category Tabs feature briefly. Take a look and click "Okay, got it!" to start using.
Now the mailbox is more compact and beautiful, isn't it?
Enable Category Tabs for Gmail web background Picture 3
Good luck!