Can Any One Explain "Invoice & Delivery" section under Customer in Microsoft Dynamics AX and Also let me explain the service what we can use for this?

Hi,

I have an urgency in the customer module with "Invoice & Delivery" section.

can anyone explain about this module and how it is useful to customer.

and what services we can use for this "Invoice & Delivery" part under customer.

It is a high priority to me.

Any one share me your best knowledge on it.