Categories
Every post needs a category. Manage them under Content → Categories.

Create a category
- Click the round + button.
- Enter a Name. The Slug is generated from the name when you save (the Generate button previews it).
- Click Choose color and pick the colour used for the category label on your site.
- Click Create.
The list shows Name, Color and Created. Deleting a category does not delete its posts; reassign them first so they keep a category.