where can I define categories on my instance? thanks, Emma

While on the Categories page /categories, click this button and you should see the New Category button. [Capture11]

How to add categories

Topic		Replies	Views
Create a category in Discourse Site Management how-to	2	9815	December 3, 2025
Unable to create and manage category Support	2	925	June 8, 2024
How do I create categories in Discourse? Support	6	1903	June 8, 2023
Can't create new category Support	3	603	February 16, 2019
Can’t create new category Support	5	855	May 16, 2021