Product Categories are a way to classify your products. You can create your own hierarchy of categories for your own references.
To create or view the product categories,
Go to Sales -> Configuration -> Product Categories and Attributes -> Product Categories
Creating a new product categories
Fields to fill
- Name [Mandatory]
- Parent Category
- Choose a parent category if this new category is a sub category.
Once the category is created, you can view the list of categories from Sales -> Products-> Products by Category