When using GA4 as a data source in GrowthBook, it can take between one to two days to start seeing data if you don't have streaming updates enabled. This is due to the delay in data appearing in GrowthBook from GA4 via BigQuery. If you have streaming updates enabled and your queries are referencing the intraday tables, you would get results immediately after the experiment starts [source](https://linen.growthbook.io/t/15872868/i-set-up-a-visual-experiment-yesterday-and-still-no-data-how). However, if you just set up the connection between GA4 and BigQuery, it can take a day for data to populate from GA4 [source](https://linen.growthbook.io/t/18461722/trying-to-add-a-ga4-data-source-i-linked-my-ga-account-to-bi). If you're not seeing any data after this period, you might want to check your setup and ensure everything is configured correctly. For instance, make sure the service account used to connect BigQuery to GrowthBook has the necessary permissions, the

trackingCallback

function is set up correctly, and if you're using Google Tag Manager, ensure the tags and triggers for the

experiment_viewed

event are set up correctly [source](https://linen.growthbook.io/t/16092348/hello-i-m-trying-to-setup-growthbook-with-google-analytics-i).

If everything is set up correctly and you have launched your experiments, you should start seeing data in your experiments between one to two days if you don't have streaming updates enabled. This is due to the delay in data appearing in GrowthBook from GA4 via BigQuery [source](https://linen.growthbook.io/t/15872868/i-set-up-a-visual-experiment-yesterday-and-still-no-data-how). However, if you have streaming updates enabled and your queries are referencing the intraday tables, you would get results immediately after the experiment starts [source](https://linen.growthbook.io/t/15872868/i-set-up-a-visual-experiment-yesterday-and-still-no-data-how). Remember, these timelines are under the assumption that all configurations are correct and there are no issues with your setup. If you're not seeing any data after this period, it might be worth revisiting your setup to ensure everything is working as expected.