Google reduces accidental clicks on in-app interstitial and mobile image ads by redefining clickable areas, cites a 15% average conversion rate improvement
Pasha Nahass / Inside AdWords :
Context & Ripple Effects
Mid-2015 is Google's mobile-quality squeeze: weeks before this change, a report found the mobilegeddon tweak had advertisers paying 16% more while click-through traffic fell 9%, and Google's own team published data showing app-install interstitials drove 69% of mobile visitors to abandon a page.
Redefining clickable areas on in-app interstitials and mobile image ads extends that same logic from ranking into ad mechanics itself: Google is filtering out unintentional taps at the ad unit level and pointing advertisers at conversion rate — up an average 15% — as the metric that matters.
First-order effects
- Advertisers buying in-app interstitial and mobile image inventory get fewer accidental clicks, so raw click counts dip but each paid click converts better — the reported 15% average conversion-rate lift becomes the justification for unchanged or rising prices.
- Publishers and app developers running those formats face stricter effective tap targets, which can thin their billable click volume even as advertiser-perceived quality improves.
Second-order effects
- Following the mobilegeddon pattern of paying more for less traffic, advertisers are pushed to compete on landing-page and conversion-tracking quality rather than CTR, rewarding the most measurement-mature buyers.
- Google's own interstitial-abandonment findings give advertisers ammunition against aggressive formats, nudging budgets toward placements that survive this kind of scrutiny.
Third-order effects
- If platforms keep redefining what counts as valid engagement, the industry's unit of value migrates from the click to the conversion — the endpoint Google reached years later when it dropped last-click as the default model in favor of data-driven attribution.
- Ad quality becomes an editorial function of the platform: whoever defines the clickable area, the viewable impression, or the valid interaction effectively sets the market's pricing denominator.
The trend: Mobile advertising is shifting its unit of accountability from raw clicks to verified conversions, with Google rewriting ad mechanics and attribution alike to enforce that definition.