Definition
A metric indicating whether an ad actually appeared on someone's screen or was technically served but never seen, like a tree falling in the forest but the forest is a webpage and the tree costs $50 CPM. Industry standard: 50% of pixels visible for one second.
Example Usage
Our viewability rate was only 40%, meaning we paid for thousands of impressions that loaded below the fold while users rage-quit the page.
Origin
Developed by the Media Rating Council in 2014 to address ad fraud concerns
Fun Fact
Before viewability standards, advertisers paid for millions of 'impressions' that loaded in hidden iframes or below 10 screens of content—the digital equivalent of billboards in tunnels.
Source: Media Rating Council (MRC) standards
Related Terms
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See “viewability” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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