# Send Feature Experimentation Event to Google Analytics
The AB Tasty > GA4 Push Connector enables you to automatically send server-side experiment data from AB Tasty’s Feature Experimentation platform to Google Analytics 4 (GA4). This integration allows you to analyse how specific feature flags and variations impact your key metrics directly within GA4, without requiring client-side tracking.
Once configured, the connector pushes campaign and variation identifiers as custom events in GA4 whenever a decision is made for a visitor. This ensures consistent experiment tracking across both platforms, enabling more unified reporting and deeper behavioural insights.
{% hint style="warning" %}
**Visitor ID requirement**\
To make this integration work, you must pass the correct GA4 user identifier when calling the Decision API.
What you must do\
• Set a user ID in GA4 if you use your own identifier, for example:\
`gtag('set', { 'user_id': '12345' });`\
• Or retrieve the GA4 client ID using:\
`gtag('get', 'G-XXXXXXX', 'client_id', (clientId) => { console.log('Client ID:', clientId); });`\
• Call the Decision API with this same visitor ID, otherwise, the hit won’t be sent to the third party
{% endhint %}
### How-to
{% stepper %}
{% step %}
#### On Google Analytics: create Custom events on GA4
* Go to **Admin** → **Data Display** → **Custom definitions**
* Create a custom dimension for:
* flagship\_campaign[^1]
* flagship\_variation[^2]
{% endstep %}
{% step %}
#### On Google Analytics: generate an API key
* Go to **Admin** → **Data streams** → **Measurement Protocol API secrets**
* Generate **an API key**
{% endstep %}
{% step %}
#### On AB Tasty: create a GA4 connector
* Go to the [**Settings > Integration Hub > Feature Experimentation Tab**](https://app2.abtasty.com/settings/integration/integration-hub?page=feature-experimentation)
* Create a **GA4 push** instance
* Enter **API secret** and **Measurement ID**
* **Measurement ID :** It is the unique ID of a data stream (i.e. one of the data sources that provides data to your property). To retrieve your GA Measurement ID go to the Google Analytics interface and click **Admin>Property>Data Streams> Web and choose your data stream**. GA Measurement ID appears at upper right. More information [here](https://support.google.com/analytics/answer/9539598?hl=en).
{% endstep %}
{% endstepper %}
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