Return on Investment (ROI): Measures the financial return relative to the campaign cost. Conversion Rate: The percentage of users who take the desired action, such as making a purchase. Click-Through Rate (CTR): The ratio of users who click on a link or ad to the number of total users who view it. Engagement Rate: Measures user interaction with the campaign content, such as likes, comments, and shares. Reach and Impressions: The number of unique users who see the campaign and the total number of times it is displayed, respectively.