BigQuery is a fully-managed data warehouse service provided by Google Cloud. It allows users to analyze large datasets quickly using SQL-like queries. With its scalable architecture, BigQuery can handle petabytes of data, making it suitable for businesses of all sizes. One of the key features of BigQuery is its ability to perform real-time analytics, enabling organizations to gain insights from their data almost instantly. Additionally, it integrates seamlessly with other Google Cloud services, enhancing its functionality for data storage, machine learning, and visualization.