If you want to combine Google Ads data with GA4 data in Looker Studio, you often encounter issues with data linking. Furthermore, the data models of both sources differ fundamentally. Additionally, merging requires a so-called blend. In this article, we explain how to combine Google Ads data with GA4 data in one Looker Studio report.

Why Can’t Google Ads Data Be Easily Combined with GA4?

First of all, Google Ads and GA4 use different data models. In Looker Studio, you cannot directly combine Google Ads data with GA4 data because the key dimensions do not match. Moreover, a common join key between both sources is often missing. Therefore, you need to create a data blend that connects both sources through a shared dimension. For more information, see our guide on Ads cost discrepancies.

Best Practices for Combining Google Ads and GA4 Data

First, you should use the date as the primary join key since both sources contain this field. Additionally, it is advisable to include only the metrics you actually need in the blend. Furthermore, you should regularly verify the data freshness of both sources. According to Google’s documentation, a maximum of five data sources per blend is possible.

Our Recommendation

If you want to combine Google Ads data with GA4 data in Looker Studio, use a data blend with the date as the join key. Moreover, we recommend testing the data sources beforehand and comparing the results with the original data. Additionally, you should only include relevant metrics to improve performance. This way, you ensure that your combined report delivers reliable data.

Conclusion

In summary, combining Google Ads and GA4 in Looker Studio requires a data blend with a shared key. Need help with the setup? Our Looker Studio service team is happy to assist.