A Serverless Query Service is a cloud-based solution that allows users to run queries on data without managing the underlying infrastructure. This means users can focus on analyzing data rather than worrying about servers, scaling, or maintenance. The service automatically allocates resources based on demand, making it cost-effective and efficient. These services typically support various data formats and can integrate with other cloud services, such as Amazon S3 or Google Cloud Storage. Users pay only for the queries they run, which can lead to significant savings compared to traditional database management systems.