Dash comes with a preset list of Sports, Age Groups, and Skill Levels as classifications for Seasons that you create. However, if there is a classification that you need to create, certain users with the proper authorization will be able to do so.
Note: You will need to have the Company Account Settings authorization turned on to create or edit classifications.
There is a separate page in Dash for each type of classification(Sports, Skill Levels, and Age Groups). Simply navigate to any one of these pages and edit existing entries or use the plus button to create new ones.