I would suggest the following two ways to evaluate the outcome of a campaign:
Key Performance Indicators (KPIs): KPIs are essential metrics that can measure the effectiveness of a campaign. It can include various factors such as the number of clicks, conversions, leads, impressions, sales, etc. By monitoring these KPIs, you can determine whether the campaign was successful or not. You can compare these metrics with the set targets to see if the campaign has achieved its goals. Based on the results, you can modify the campaign's strategies and optimize it to achieve better results.
Customer Feedback: Feedback from customers can also be a valuable metric to evaluate a campaign's success. By conducting surveys, social media polls, and online reviews, you can gather information about the customers' experience with the campaign. You can analyze the feedback to determine the effectiveness of the campaign and identify the areas that need improvement. Positive feedback indicates that the campaign has resonated well with the customers, while negative feedback can help you identify the areas where the campaign needs improvement.
In conclusion, a combination of KPIs and customer feedback can provide a comprehensive evaluation of the campaign's effectiveness, helping businesses to make data-driven decisions and optimize their marketing strategies for better results.