Final answer:
The sales manager is utilizing horizontal information flows by using ZIP code data from customer orders to inform an advertising campaign, which facilitates integration and strategy development within the same organizational level.
Step-by-step explanation:
When the sales manager uses ZIP code data taken from customer order forms to plan an advertising campaign, she is leveraging horizontal information flows.
This type of flow refers to the sharing of information across different areas of the business that are on the same level in the organizational hierarchy, such as sales, marketing, and customer service. In the context of Order Entry/Sales (OE/S) processes, horizontal flows are crucial for integrating customer insights across various departments and facilitating a cohesive strategy for targeting and engagement.