DECA Market Planning Practice Test

Understanding these metrics helps you gauge different parts of an ad campaign: how well the ad prompts action, what each interaction costs, and how efficiently you turn clicks into valuable outcomes. Click-through rate shows how often people who see the ad actually click it, which serves as a proxy for how engaging or relevant the ad is to the audience. Cost per click tells you the price you pay for each of those clicks, giving a direct measure of ad expense per engagement and informing bids and budget planning. Cost per action (conversion) reveals how much you spend for each desired result, such as a sale or signup, letting you assess overall efficiency and ROI of the campaign. This alignment—CTR as engagement with the ad, CPC as the cost per click, and CPA as the cost per conversion—best captures what each metric indicates. Other statements mix up these meanings (for example, CTR is not revenue, CPC is not time on site, CPA is not just about impressions), so they don’t accurately describe what the metrics measure.