KSQL`, a query service developed by Confluent, is used to analyze data streams from Apache Kafka topics. It provides a powerful interface for building and exploring KSQL objects, including streams, tables, and SQL queries. The service offers various features such as metrics, error tracking, and debugging tools to help users troubleshoot issues with their queries. Additionally, it integrates with Confluent Control Center, which provides monitoring, management, and alerting capabilities for Apache Kafka environments. The service also exposes a wealth of metrics through JMX, allowing users to analyze data streams in more detail. Furthermore, it supports versioned key-value state stores, enhancing stateful processing capabilities in Kafka Streams. By using KSQL, users can gain insights into their data streams and optimize their applications for better performance and reliability.