Nearly half of U.S. consumers say they sometimes or rarely accept cookies when prompted. 77 percent use at least one privacy tool. For advertisers relying on conversion tracking to inform bidding and optimisation, an increasing share of results is going unmeasured.
Microsoft Advertising's Advanced Consent Mode addresses this directly. It does not attempt to collect more data. Instead, it applies intelligent modelling using aggregate trends to estimate conversions that would otherwise go untracked when a user declines consent. No individual user data is passed back.
How It Works
Two technical requirements must be met. The Universal Event Tracking tag must load before the consent banner appears on the page. This allows the system to read the default consent state from the initial page view. When a user grants consent, an explicit granted signal must be sent on every relevant page. Most consent management platforms including OneTrust and Cookiebot handle this automatically through Google Tag Manager.
One configuration issue trips up many advertisers. If your consent management platform completely blocks the UET tag from firing until consent is granted, Advanced Consent Mode cannot work. The tag needs to execute and read the denied state before it can model the missing conversions. No advertising identifiers attach when consent is denied. This is a setup issue, not a privacy concern.
Verifying Your Setup
The UET Tag Helper browser extension confirms four things. UET loads before the consent banner. The default consent state is denied. The status updates correctly after user approval. No identifiers attach to requests when consent is declined. If any of those checks fail, the implementation needs attention.
Why This Should Be a Priority
Accurate conversion data drives better automated bidding, stronger audience signals, and more reliable return on ad spend reporting. Every conversion that goes unmeasured degrades the data that smart bidding uses to optimise. This is especially relevant for campaign types like Performance Max that rely heavily on conversion signals to distribute budget across formats. Advertisers who configure Advanced Consent Mode correctly maintain measurement quality that directly affects campaign performance.
If this is not yet configured on your Microsoft Advertising account, it should be a near term operational priority. The setup is straightforward and the impact on measurement accuracy is significant. Need help reviewing your tracking setup? Our audit and support services cover exactly this.
This insight is based on content originally published on the Microsoft Advertising Blog, rewritten with added context and perspective by Scepter Digital.
