Attributes and items are often confused, which is why we're explaining the difference as clearly as possible here.
Attributes are individual components you add to a product. For example, a customer orders fries with mayonnaise. Mayonnaise is the attribute in this case.
Items define the product itself. For example, a customer orders a small fries with mayonnaise. "Small" is the item here.
Dock offers users the ability to add attributes and items, as many as you need.