Kiali is an open-source observability console for Istio, designed to help monitor, manage, and visualize the service mesh and its components. It provides a real-time view of the Istio service mesh, allowing users to understand the structure of their microservices architecture, investigate issues, and perform operational governance. Kiali offers features such as graph visualization of the mesh, metrics, traces, and integrated Jaeger tracing, helping users to gain insights into the performance and reliability of their applications. It is an essential tool for those using Istio to manage service-to-service interactions within their Kubernetes environments.