Which of the following metrics is a common creative test success criterion that can indicate how often people click on your ad after seeing it?

Click-through rate (CTR) directly measures how often people click on your ad after seeing it, making it an excellent indicator of creative effectiveness. A higher CTR suggests your ad creative is engaging and relevant to your target audience. Impressions simply count how many times your ad was displayed, not how many people interacted with it. Conversion Rate (CVR) measures how often clicks lead to a desired action (like a purchase), which is a downstream metric and doesn't solely reflect the ad creative's ability to attract initial clicks. Reach indicates the total number of unique users who saw your ad, but not their engagement with it.