What do SKUs represent for Verizon's products and services?

SKUs, or Stock Keeping Units, are unique identifiers assigned to products and services sold by Verizon. They help in tracking inventory and managing sales processes. The correct answer specifies that these codes are applicable on invoices, which includes various plans and promotions offered by Verizon. This means that when a customer makes a purchase, the SKU reflects the specific product or service they have chosen, allowing for accurate billing and tracking.

By providing a code that encapsulates product details, SKUs ensure that the company's inventory systems, sales team, and billing departments can accurately identify and process the purchased services. This plays a key role in ensuring efficient sales operations and enables Verizon to manage their offering effectively in terms of promotions and different plans. The other options do not capture the core function and application of SKUs in the context of Verizon's product offerings.