The option Product Attribute enables you to take over values out of the linked Magento product into the Configurator. Most of the time this option is used to access the base price for calculations inside the template,
but you can access any possible attribute but inserting the respective Attribute Code.
Presentation in the frontend
The Product Attribute isn't really ment to be displayed in the frontend, but more as a value to work with in the backend.
Settings in the backend
Here we have inserted the Product Attribute "price" to access the base price out of the linked Magento Product, but you can insert any attribute you like.