Marketing metrics is a framework used by marketers to evaluate marketing performance and justify marketing programs. It provides numeric data to support marketing efforts and measure elements like sales, product registrations, brand awareness, return on investment, and website traffic. Managers use marketing metrics to improve company performance, understand competitor reactions, and assess marketing assets like brand equity. The increasing need to measure non-tangible assets like brand equity in changing market conditions is driving greater use of marketing metrics by companies to learn from successes and failures.