When having access to Settings tab, you can decide if you want adding tags to newly created candidate profiles and jobs to be required for the users.

To do that, visit Settings --> General settings and go to General system settings section. You can decide here if you want the system to require adding tags when creating candidates profiles and jobs by moving the slider to the right.

If this feature is turned on, adding at least one tag will be required when creating a new candidate profile or a new job: