There is only one setting in this section, which allows you to create multiple Tag Categories.

 

 

Allow multiple Tag Category Names to be saved by comma separating them (Applies when adding New Tag Categories)

When this option is enabled, by entering comma separate Tag Category Names, they will be created as individual Tag Category Records.  This only applies when creating New Tag Categories, in which you will see a notification in the page indicating the feature is active.  Editing existing Tag Categories do not have this feature.