What does vCPM stand for?

The selected answer option, Viewable cost per mille, is correct because vCPM stands for Viewable cost per mille, where "mille" is Latin for thousand. This metric is used in advertising to measure the cost of 1,000 impressions of an ad that are actually viewable by the user, meaning the ad must meet certain criteria (e.g., being on the screen for a set amount of time) to be considered viewable. vCPM allows advertisers to pay for impressions where the ad had the opportunity to be seen, rather than simply paying for impressions that were served but potentially not viewed. This ensures more value for advertisers, as they are charged for impressions that are more likely to drive engagement. The other options, such as "Volume cost" and "per million," are incorrect and do not accurately describe the vCPM metric.