Which of the following metrics can you use to measure your conversion goals?

The correct answer is Sales because sales directly reflect the success of a campaign in achieving conversion goals. Conversion goals typically refer to the actions you want customers to take, such as making a purchase. Sales are the ultimate indicator of conversion success, as they show how many units were sold as a result of a campaign's influence. Metrics like Subscribe & Save and Traffic are important for other aspects of the customer journey, but they do not directly measure conversions in the form of completed sales, which are the key metric for tracking the effectiveness of conversion-oriented goals.