Growth Book has integrated native support for ClickHouse as a data source, streamlining the process for users to conduct A/B testing with their experiment data. ClickHouse, an open-source data warehouse and OLAP system known for its scalability, powers platforms like Yandex.Metrica. To utilize this feature, users need to add ClickHouse as a data source within Growth Book by selecting it from a dropdown menu and entering the necessary connection details. Once set up, users can create metrics for testing, enhancing their ability to experiment efficiently.