Observed Signal · May 27, 2026 · Technical Release · Source: https://www.blogger.com/feeds/7815614485808579332/posts/default?category=google_ads_api&orderby=published · Impact: 4/5 · Sentiment: Positive
Google Ads API adopts 'Total Co-view' for Reach
Google announced that, beginning June 2, 2026, the Google Ads API will change its reach metric definition to a "Total Co-view" model. The update aligns Google Ads reporting with offline media and third‑party measurement standards and will count all individuals who watched an ad on a connected TV (including multiple people viewing the same YouTube screen). The change affects several campaign-level reach and frequency metrics (unique users and multi-view thresholds). No API version migration or code changes are required — the change is a data definition update applied automatically — but advertisers and developers should expect potential shifts in reported reach and frequency for dates on and after the launch and update internal documentation or dashboards accordingly. The announcement was published by Mattia Tommasone from Google’s Advertising and Measurement Developer Relations team.
A technical/data-definition change from Google (a major platform) that alters how reach and frequency are reported across Google Ads surfaces and aligns reporting with third‑party/offline standards — likely to affect measurement, dashboards, and campaign reporting for many advertisers and measurement partners.
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Key Takeaways & Evidence Grounding
- Google Ads API will change reach metrics to a "Total Co-view" definition starting June 2, 2026.
- The new definition counts individuals who viewed an ad on connected TV devices, including multiple people watching YouTube on the same TV screen.
- Campaign-level metrics impacted include metrics.unique_users and several metrics.unique_users_X_plus frequency metrics (two_plus, three_plus, four_plus, five_plus, ten_plus) and metrics.average_impression_frequency_per_user.
- No API version migration or code changes are required; the data definition change will be applied automatically.
- Announcement published May 27, 2026 by Mattia Tommasone (Google’s Advertising and Measurement Developer Relations team).
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