The Viewability Revolution in Ad Tech Once upon a time, publishers got paid every time an ad loaded—even if it never appeared on the user's screen. Not anymore. Advertisers now want proof that their ads are actually seen. That proof is called viewability , and it has become one of the biggest drivers of CPM performance today. In a world flooded with content, advertisers are no longer satisfied with quantity. They’re demanding quality—visibility, engagement, and context. That means publishers must do more than just show ads. They must prove their value by showing ads that users actually notice. What Is Ad Viewability? The standard definition, as set by the Media Rating Council (MRC), says an ad is viewable when: Display ads: 50% of the ad’s pixels are in view for at least one continuous second Video ads: 50% of the player is visible for at least two continuous seconds This sounds simple—but it has massive implications for your CPM. Why Advertisers Care So Much ...
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