How do you calculate Click-Through Rate(CTR)?
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Correct answer: Clicks/impressions x 100.
Why this is the answer
Click-Through Rate (CTR) is calculated by dividing the number of clicks an ad receives by the number of times it's shown (impressions), then multiplying by 100 to express it as a percentage. This metric indicates the effectiveness of an ad in attracting user engagement. The option "Cost per Purchase-Totalspend/total purchases" calculates the cost per purchase, not CTR. "Spend/(impressions/1000)" calculates the cost per mille (CPM), which is the cost per thousand impressions, not CTR.
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