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Google Consent Mode v2:
The Definitive Guide

Privacy Team
Technical Review
8 min read
March 15, 2025

If you run Google Ads in Europe, the rules have changed. Here is how to implement the new standard without losing your data or risking suspension.

What is Consent Mode v2?

Google Consent Mode v2 is an API that allows your website to communicate user consent status to Google's tags (Analytics, Ads, Floodlight). Instead of blocking tags entirely (which results in 100% data loss), Consent Mode allows tags to run in a "restricted" state if consent is denied.

Why it matters

Google claims Consent Mode can recover up to 70% of ad-click-to-conversion journeys lost due to cookie consent choices. It fills the data gap with AI modeling.

Basic vs. Advanced Mode

There are two ways to implement it. Choose wisely.

Option A

Basic Mode

  • 100% GDPR Compliant
  • Tags are BLOCKED until consent
  • No data sent before click
  • High data loss
RECOMMENDED
Option B

Advanced Mode

  • Sends "Cookieless Pings"
  • Enables Google AI Modeling
  • Recovers lost conversions
  • Tags load immediately

Implementation Code

When a user interacts with our banner, we automatically send the following signals. You can verify this in your GTM debug view.

gtag.js
gtag('consent', 'update', {
  'ad_storage': 'granted',
  'ad_user_data': 'granted',
  'ad_personalization': 'granted',
  'analytics_storage': 'granted'
});

Check Your Status

To verify your implementation, open your browser console and type dataLayer. Look for the most recent "consent" event. You should see the ad_user_data and ad_personalization parameters (these are the new v2 additions).

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