Gtag Integration (Consent Mode)

4min
The following guide shows how to send the update consent signal to gtag through the mapping offered by PubConsent.
This documentation is intended to provide a detailed overview of each setting in Google’s Consent Mode, strictly following the explanations and guidelines as provided by Google. It does not imply that the Consent Mode settings are designed to satisfy or address any particular regulatory requirements.
The complete explanation of how Google's consent mode works is available at the following link: https://support.google.com/google-ads/answer/10000067﻿
Before following this guide, make sure that the PubConsent integration code available in the configurator is present on the page.
Make sure you have followed the steps provided by the Google documentation at the following link: https://developers.google.com/tag-platform/security/guides/consent?consentmode=advanced﻿
Add the following script to set the default consent status, before the CMP script integration code:
JS
<script>
gtag('consent', 'default', {
  'ad_storage': 'denied',
  'ad_user_data': 'denied',
  'ad_personalization': 'denied',
  'analytics_storage': 'denied'
});
// Other calls to the gtag method MUST be placed after the call with consent default.
</script>
<script>
gtag('consent', 'default', {
  'ad_storage': 'denied',
  'ad_user_data': 'denied',
  'ad_personalization': 'denied',
  'analytics_storage': 'denied'
});
// Other calls to the gtag method MUST be placed after the call with consent default.
</script>
﻿
The call shown must be the first call to the gtag method, even before the call: gtag('config', <code>).
After configuring the default state of the consent mode, you need to configure the callback that will allow you to execute the update with the values of the consent mode taken from the user's consent.
JS
<script>
var __pubtech_queue_on_consent = __pubtech_queue_on_consent || [];
__pubtech_queue_on_consent.push(
  function onConsent(
    cmpType,
    data
  ) {
  
    if (cmpType == 'TCF-V2-GDPR') {
        var googleConsents = data.integrations.googleConsentMode;
        gtag("consent", "update", {
          ad_user_data: googleConsents.adUserDataGranted ? "granted" : "denined",
          ad_personalization: googleConsents.adPersonalizationGranted
            ? "granted"
            : "denined",
          ad_storage: googleConsents.adConsentGranted ? "granted" : "denined",
          analytics_storage: googleConsents.adConsentGranted
            ? "granted"
            : "denined",
        });
    }
    
    if (cmpType == 'GOOGLE-CONSENT-MODE') {
        var googleConsents = data.integrations.googleConsentMode;
        gtag("consent", "update", {
          ad_user_data: googleConsents.adUserDataGranted ? "granted" : "denined",
          ad_personalization: googleConsents.adPersonalizationGranted
            ? "granted"
            : "denined",
          ad_storage: googleConsents.adConsentGranted ? "granted" : "denined",
          analytics_storage: googleConsents.adConsentGranted
            ? "granted"
            : "denined",
        });
    }
  },
);

</script>
<script>
var __pubtech_queue_on_consent = __pubtech_queue_on_consent || [];
__pubtech_queue_on_consent.push(
  function onConsent(
    cmpType,
    data
  ) {
  
    if (cmpType == 'TCF-V2-GDPR') {
        var googleConsents = data.integrations.googleConsentMode;
        gtag("consent", "update", {
          ad_user_data: googleConsents.adUserDataGranted ? "granted" : "denined",
          ad_personalization: googleConsents.adPersonalizationGranted
            ? "granted"
            : "denined",
          ad_storage: googleConsents.adConsentGranted ? "granted" : "denined",
          analytics_storage: googleConsents.adConsentGranted
            ? "granted"
            : "denined",
        });
    }
    
    if (cmpType == 'GOOGLE-CONSENT-MODE') {
        var googleConsents = data.integrations.googleConsentMode;
        gtag("consent", "update", {
          ad_user_data: googleConsents.adUserDataGranted ? "granted" : "denined",
          ad_personalization: googleConsents.adPersonalizationGranted
            ? "granted"
            : "denined",
          ad_storage: googleConsents.adConsentGranted ? "granted" : "denined",
          analytics_storage: googleConsents.adConsentGranted
            ? "granted"
            : "denined",
        });
    }
  },
);

</script>
﻿
Consents' Mapping (Google Consent Mode)
To know which user choices correspond to Google's consent types, here's the corresponding mapping we provide:
CMP Type: GDPR TCF
CMP Type: Google Consent Mode
ad_storage -> TCF Purpose 1
ad_user_data -> TCF Purpose 1 e 7
ad_personalization -> TCF Purpose 3 e 4
analytics_storage -> Cookie Measurement
functionality_storage -> Cookie Feature
personalization_storage -> Cookie User Experience
security_storage -> Cookie Feature
The consent mapping is 1 to 1, meaning that in the consent panel you will see the types of consent from Google Consent Mode listed without any mask.
﻿
Updated 03 Dec 2024
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