Parent Categories and Categories are used to organize your Questions, Tests and surveys.
Create and manage your Categories under Tests > Categories page, or create new Categories on the fly wherever you see a 'New Category' link.
Tip: Categories are particularly useful when you want to create a Test or survey using Randomly selected Questions.
Adding Randomly selected Questions means Questions are automatically selected from specified Categories within your Question Bank. Each time the Test or survey is taken, a different set of Questions is displayed.