Each delivery option can opt to provide a method of calculation, with the available tools displayed on screen, and the ability to filter if the delivery option appears in the checkout under certain conditions.
The functionality can be extended if the plugin detects Gravity Forms installed, and allows you to pick a form to be displayed on the checkout if your delivery option is selected. Upon order submit, the details are saved and are visible inside of the order view of the WooCommerce admin.
Again, if you have Advanced Custom Fields installed, you can create custom fields which appear inside of the shipping admin area and, with custom code, can be used to create an advanced shipping section on a custom theme.
Cover art by Ruchindra Gunasekara