Google Consent Mode v2 (Basic)

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Google Consent Mode v2 ensures that Google vendors associated with a consent notice comply with an end-user's consent choices (called consent types) defined by Google. In this article, we will cover how to implement Google Consent Mode v2 on a consent notice utilizing Google basic consent mode setup.

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Click here for information on how to configure Google advanced consent mode.


In the basic version of Google Consent Mode v2, Google product tags should be blocked by your organization from loading until an end-user interacts with your consent notice on the website. Once the end-user interacts with the consent notice, one of the following can occur:

Consent

If an end-user grants consent then Google product tags will load and execute the consent mode APIs.

No Consent

If an end-user does not grant consent then no data is transmitted to Google (not even a default consent state). Google tags will remain blocked and Google Consent mode's modeling for ads will be based on a general model.

The following Google products have built-in consent checks and will adjust behavior based on the end-user's consent state for Google consent types:

  • Google Tag

  • Google Analytics (includes Google Analytics for Firebase SDK)

  • Google Ads (includes Google Ads Conversion Tracking and Remarketing; support for Phone Call Conversions is pending.)

  • Floodlight

  • Conversion Linker

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Google Consent Mode only supports gtag.js . Ensure your organization is not utilizing legacy tags for your Google products such as ga.js, analytics.js, or conversion.js .

Consent check varies across each Google product and can be viewed by selecting a vendor from the GTM platform and expanding the Advanced Settings > Consent Settings tab.

Didomi offers multiple ways your organization can implement Google Consent Mode v2 (Basic) for GDPR consent notices. Please see the tabs below for the method that best suits your organization's needs:

In this tab, we will cover how to utilize Google Tag Manager to implement Google Consent Mode v2 (Basic) for a GDPR consent notice.

From the consent notice, click the Customization tab and select Integrations.

Click Consent Modes and enable the toggle inline with Google Consent Mode v2.

Expand the Google Consent Mode v2 accordion to configure the details of the integration. Review the table below for information on each toggle in the integration configuration:

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Toggle
Description

Set the default status of Google Consent Mode when the page loads

The basic version of Google Consent Mode v2 will block Google product tags an end-user interacts with your consent notice. Ensure this toggle is de-activated to ensure no default status is set for the basic version.

Enable Google Advertising Products

Will add Google Advertising Products vendor (API ID: google) to the consent notice. Designed to encompass Google products who utilize one or more of the following consent types:

  • ad_storage

  • ad_user_data

  • ad_personalization

  • functionality_storage

  • personalization_storage

  • security_storage

Enable {consent type} before user gives consent

For each consent type, will override the default status of the Google consent type and set it to granted as soon as the Google product tag loads. With Google Consent Mode v2 (Basic), Google product tags will be blocked until the end-user grants consent and not even the consent state is sent to Google. These settings do not need to be enabled.

Enable Google Analytics Products

Will add Google Analytics Products vendor (API ID: googleana-4TXnJigR) to the consent notice. Designed to encompass Google products who require the analytics_storage consent type.

Enable TCF integration with Google Consent Mode

Enables Didomi to set an additional flag (TCData.enableAdvertiserConsentMode to true) for getTCData and addEventListener commands. This additional flag allows Google to infer and map consent settings to the following Google Consent Mode v2 consent types based on IAB TCF purposes:

  • ad_storage

  • ad_user_data

  • ad_personalization

Click herearrow-up-right for more information on how Google calculates the mapping between IAB TCF purposes and Google consent types. Note: The TCF integration with Google Consent Mode does not support Google product tags that require the analytics_storage, functionality_storage, personalization_storage, or security_storage consent types. For Google products that require the analytics_storage consent type, Didomi will set this consent type to granted if the end-user consents globally (consent to vendor and all of its purposes) for Google Analytics Products (API ID: googleana-4TXnJigR).

Data layer name

By default, Didomi utilizes dataLayer as the variable name for your organization's Google Tag Manager dataLayer. If your organization has edited the variable name for your dataLayer then input that variable name in the provided space.

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Alternatively, your organization can utilize the window.didomiConfig object to configure Google Consent Mode v2 (Basic) on your consent notice. While Didomi recommends utilizing the console to enable the feature as detailed above, the window.didomiConfig method can be a useful method for testing.

Configure Google product tag(s)

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In order to ensure Google product tags are blocked in accordance with a Google Consent Mode v2 (Basic) setup your organization must configure the Google product tags in Google Tag Manager to trigger only when an end-user grants consent to the respective Google product.

First, your organization should create a data layer variable for didomiVendorsEnabled as it will be used in the triggering:

From your organization's Google Tag Manager workspace, navigate to your Google product tag and edit the trigger.

Configure your trigger with the following fields:

Field
Value

Trigger Type

Custom Event

Event name

didomi-consent

This trigger fires on

Some Custom Events

Event condition

didomiVendorsEnabled contains <vendor API ID> Note: Replace <vendor API ID> with the actual ID for the vendor that when consented to will trigger the Google product tag.

When finished, Save the trigger and tag setup. Submit your Google Tag Manager container changes aligned with your organization's policies.

When successfully and appropriately configured, a Google Consent Mode v2 (Basic) implementation will keep the relevant Google product tags from triggering until the end-user grants consent to the respective Google vendors associated with your consent notice. In this section we will cover how to test whether your Google Consent Mode v2 (Basic) configuration is working as intended.

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If you need further assistance or have noticed something unusual, please feel free to reach out to [email protected]envelope.

As mentioned above during the configuration, Google Consent Mode v2 (Basic) requires the use of the following vendors Google Advertising Products (API ID: google) and/or Google Analytics Products (API ID: googleana-4TXnJigR) depending on the Google products your organization utilizes.

Before continuing, ensure that the correct vendors are added to the consent notice to reflect the Google products that will be triggered:

Test Google product tag(s) triggering

When testing the Google Consent Mode v2 (Basic) implementation, your organization will want to confirm three actions :

  • Google product tags do not fire prior to consent action

  • Google product tags do not fire if an end-user denies consent

  • Google product tags fire only when an end-user grants consent

How your organization tests that Google product tag(s) are triggering as expected of a Google Consent Mode v2 (Basic) setup is dependent on how you configured the implementation on the consent notice:

Implementation method
Available testing

Google Tag Manager

  • Google Tag Manager

  • Website

gtag.js

  • Website

GTM template

  • Google Tag Manager

  • Website

In this tab, we will cover how to test your organization's Google Consent Mode v2 (Basic) implementation via the website on which the Didomi consent notice is deployed.

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It is recommended that the following tests are done using an Incognito window for your browser.

Google product tags do not fire prior to consent action

Access the website on which you have deployed the Didomi consent notice with a Google Consent mode v2 (Basic) implementation and let the consent notice load on the page. It is important that you do not interact with the consent notice yet.

Open the browser console and navigate to cookie storage (for Chrome it is the Application> Cookies and Firefox it is Storage>Cookies).

Ensure that no cookies are dropped from consent-aware Google products utilized by your organization (e.g. Google Analytics, Ad Words, Floodlight, etc...).

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Click herearrow-up-right for more information on cookie names for Google products.

Next, select the Network tab in the browser console and use the provided search filter to search for:

  • analytics.js

  • gtag

  • collect

  • gcs

  • gcd

Ensure there are no network requests being performed with these parameters.

Google product tags do not fire if an end-user denies consent

Access the website on which you have deployed the Didomi consent notice with a Google Consent mode v2 (Basic) implementation and let the consent notice load on the page. Deny consent for all vendors and purposes.

Open the browser console and navigate to cookie storage (for Chrome it is the Application> Cookies and Firefox it is Storage>Cookies).

Ensure that no cookies are dropped from consent-aware Google products utilized by your organization (e.g. Google Analytics, Ad Words, Floodlight, etc...).

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Click herearrow-up-right for more information on cookie names for Google products.

Next, select the Network tab in the browser console and use the provided search filter to search for:

  • analytics.js

  • gtag

  • collect

  • gcs

  • gcd

Ensure there are no network requests being performed with these parameters.

Google product tags fire only when an end-user grants consent

Access the website on which you have deployed the Didomi consent notice with a Google Consent mode v2 (Basic) implementation and let the consent notice load on the page. Grant consent for all vendors and purposes.

Select the Network tab in the browser console and verify that requests for Google Analytics and/or Google Ad Words contain a gcd parameter and that its value reflects the choices made by the end-user.

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The value for gcd will resemble a string of characters: gcd=11<ad_storage>1<analytics_storage>1<ad_user_data>1<ad_personalization>5 Each storage has the possible value “e”, “r”, “n” or “v” which equal granted in a GCM update after user interaction with the CMP

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