Visible CPM, also known as vCPM, is a metric used in digital advertising to measure the cost of reaching 1,000 potential customers with an ad that is actually seen by them. This means that the ad is not just loaded on a webpage, but is actually visible to the user, increasing the chances of it being noticed and remembered. This metric takes into account factors such as ad placement, size, and user behavior to determine the true cost of reaching a thousand people with an ad that has the potential to make an impact. In today’s cluttered digital landscape, where ads are often ignored or blocked, visible CPM provides a more accurate and valuable measure of ad effectiveness.