Consider an online retail company planning to launch several digital advertising campaigns to promote different product lines. Based on your understanding of ad campaign and account structure, match the following components to their correct descriptions:
- Component I: The level where the company sets specific goals like increasing website traffic or boosting product sales.
- Component II: Creating targeted messages to reach different audience segments interested in specific product lines.
- Component III: The overarching structure under which all product line campaigns are organized and managed.
Identify the correct component for each description.