Sure, it is this part here:

Instead of hardcoding a field called Item_width you would create that new Field (thing) in your database with the name Item_width and assign it to the specific category of product. May also want to add a field type optionset if its yes/no, text, number, etc.

This means users can create new fields as needed and can easily Search for the fields associated with a category/product without relying on you to add them to the app and add yet another column to some table :blush:

Similar to some of the suggestions here on the forum where people ask to build custom form builders, you need to store Question and Answers dynamically where users can create their own