How to add and change categories in a WordPress website.
Login to your WordPress dashboard.
Select Posts in the left navigation menu.
Choose Categories.
On the right is a list of categories you can edit to rename, add or change descriptions and slugs.
In the center are text boxes where you can name a new category, enter a slug, and write a category description.
The slug should be a few keywords or phrase(s) that the typical person would enter into a search engine in order to find what your business has to offer.
After entering the new information, click the “Add New Category” button at the bottom.