Google

On April 18th, Google published the results from Google Ads’ interest-based advertising testing, where, among other tools, Topics API was analyzed. We are happy that the Google Ads team joined RTB House and Criteo in openly publishing findings from experiments with Privacy Sandbox APIs.

In the report, the Google Ads team compares the effectiveness of applying Topics API, contextual signals, and publisher first-party IDs instead of cookies for Interest-Based Advertising (IBA). Third-party cookies were allowed in this experiment for use cases unrelated to targeting, such as frequency capping and measurement.

Topics API has been discussed many times in the media at a conceptual level, but there are few detailed studies, especially showing the scale of availability of these signals in the browser. We will try to answer the question of what causes this.

Google proposed that instead of deprecating third-party cookies for all users in Chrome, they will let users decide whether to allow third-party cookies in the browser. Google also emphasized their continued investment in the Privacy Sandbox to ensure its performance and utility.