The document outlines the evaluation of three advertising campaigns aimed at enrolling students in a digital marketing nanodegree, with an emphasis on assessing return on investment (ROI) and suggesting optimizations. Key results show varying performance, with the first campaign achieving the highest profitability, while the second one may require reevaluation due to high costs per acquisition. Recommendations for future efforts include A/B testing diverse ads, adjusting targeting strategies, and leveraging video and dynamic advertisements to enhance engagement.