Product categories are the primary way to group products with similar features. You can also add subcategories if desired.
Categories are managed from the Dashboard > CATALOG > Categories screen.
On the right Panel, You can do Bulk Action(Delete, Trash) any Category or Search by name of the Category
On Left Panel, you can add a Category for a Product easier.
When you add a new product via Dashboard > CATALOG > Categories, you can select this new product category from the list.