How can you assess the effectiveness of a promotional campaign?

Assessing the effectiveness of a promotional campaign involves looking at multiple metrics that provide a comprehensive understanding of its impact. Analyzing sales data allows you to measure direct revenue generated from the campaign, while customer feedback can provide insights into consumer perceptions and satisfaction. Understanding the return on investment (ROI) is crucial as it helps evaluate the financial success of the campaign relative to its costs. This multifaceted approach ensures that you capture various dimensions of the campaign's performance, making it easier to identify strengths and areas for improvement.

In contrast, simply estimating brand awareness through social media likes provides a limited view, as it does not measure actual sales or customer sentiment. Conducting employee interviews and surveys may offer some insight, but it is not directly focused on customer response to the promotion. Monitoring store foot traffic alone fails to capture the intricacies of customer behaviors and reactions, which are essential for a complete assessment of a campaign's success. Thus, the comprehensive approach highlighted in the correct choice stands out as the most effective method for assessing a promotional campaign.