Categories are tags you can use to tag items with different information. Each category consists of a name and a set of options which are values for that category. You can filter items by searching for a specific category and value.
Go to Settings.
Give the new category a name and click Add new tag .
Write the first option for the new tag and click Add new option.
You can always create more categories or add values to already existing tags. To edit a value or category, click the gear item. All categories and values are listed.