The third-party cookie going away won’t only affect advertisers’ abilities to target ads but also their means of knowing which of those ads led to product sales or conversion events.
To help fill that cookie-sized hole in the digital ad industry’s measurement system, Google has developed the Attribution Reporting API as part of its Privacy Sandbox set of proposed third-party cookie replacements.
The Attribution Reporting API effectively has the browser play the part of the third-party cookie. But in order to protect people’s privacy, it restricts advertisers’ and publishers’ abilities to connect ad exposure and conversion data while introducing noise and delays.
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The original post is at Marketing Archives – Digiday
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