Kanban is an approach for optimizing workflow that uses visual cues and limits on work-in-progress to facilitate continuous improvement. It focuses on measuring and improving the flow of work rather than following a prescriptive process. Kanban is well-suited for teams focused on delivering services in response to requests. It aims to spark collaboration, identify and remove impediments, and stop partially completed work from piling up. Metrics like cycle time, throughput, and work item age help teams track progress and quality of their services over time.