There are two sets of Category that can be created, Parent Category and Child Category (Sub-Category), and the listings can be added into those categories.
HOW TO ADD CATEGORY?
STEP 1: Login to WordPress admin dashboard.
STEP 2: Go to Listings > Categories
STEP 3: Enter a Name and Slug
STEP 4: Select Parent Category if creating a Sub-Category.
STEP 5: Add Category Icon.
STEP 6: Add Category Banner.
STEP 7: Assign Category Features.