To determine an ad's click-through rate, marketers must know both the number of click-throughs and the number of impressions.

Question

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Click-through rate is calculated by dividing the number of clicks an ad receives by the number of times the ad was shown (impressions). Therefore, marketers need to know both the number of click-throughs and the number of impressions to determine the ad's click-through rate.

To Determine an Ad's Click-Through Rate, Marketers Must Know Both