What is the term for the metric that measures the percentage of viewers who watched at least 30 seconds of a video ad?

What is the term for the metric that measures the number of times your ad is shown to a user?

What is the term for the ratio of the number of times your ad is shown to the number of times it is clicked?

If you ran a successful awareness campaign using a 30-second video ad and now see the value of remarketing to audiences who watched it with memorable, shorter video ads, what video ad format should you use to achieve that goal?

Which social media advertising metric measures the number of times a user takes a specific action, such as liking a post or clicking a link?

Which marketing metric measures the percentage of people who click on an ad, after viewing it? Click-Through Rate (CTR)  Impressions  Conversion Rate  Bounce Rate