Advertising metrics are measurements used to evaluate the effectiveness of advertising campaigns. These metrics help businesses understand how well their ads are performing in terms of reach, engagement, and conversion. Common metrics include click-through rate (CTR), cost per acquisition (CPA), and return on ad spend (ROAS). By analyzing these metrics, companies can make informed decisions about their advertising strategies. For instance, a high CTR indicates that an ad is appealing to its audience, while a low CPA suggests efficient spending. Overall, advertising metrics are essential for optimizing campaigns and maximizing return on investment.