How can a manager track the effectiveness of a marketing campaign?

Analyzing sales data and customer feedback is a robust method for tracking the effectiveness of a marketing campaign. This approach allows a manager to gather quantitative data, such as sales figures, which can indicate whether the campaign has successfully driven revenue. Additionally, customer feedback provides qualitative insights that reveal customer perceptions and behaviors influenced by the campaign. This combination of data allows for a comprehensive evaluation of the campaign’s impact, enabling managers to understand what worked, what didn't, and how future campaigns can be improved.

Other options are less effective because they either rely on non-quantitative measures or focus on factors not directly tied to the campaign's performance. Guessing customer responses lacks empirical support and leads to inaccurate conclusions. Relying solely on social media likes provides a limited view of engagement and does not measure direct sales or customer loyalty. Lastly, comparing staff performance before and after the campaign does not directly reflect on the campaign's effectiveness but rather on employees’ execution, which may be influenced by many other variables.