It is possible to create categories within a challenge to make it easier to organize projects in different themes. Thus teams will be able to associate one or more categories to their projects. This allows, for example, that in a scenario where a challenge has different prizes by theme/category, projects are filtered by them.
On your challenge page (CMS), under categories menu (challenge > settings > categories), you can see all your categories, create new ones, edit and delete existing categories.
To create a new category, you just need to click on the "New Category" button and fill out the form with: