Hi @mjcensullo @MRHOLGRAVE
Categories are a predefined collection that you can use to organize the products you’ll be selling in your store. Categories template page is just a way to show data associated with Categories on the page.
To give a more specific example, if you were to sell clothing in your store, you can have categories like: Shoes, Tshirts, Sweaters, Jackets, etc.
Then after creating different products, and adding them to appropriate Categories, you can use template page to show these products on the website. In this example, your customers will be able to browse your store by category.
To build it, you can simply add a Collection List on the Categories template page, and then bind it to Products collection via a reference.
Please let me know if you have additional questions!