Kanban is a scheduling and workflow management system developed at Toyota in the 1940s. It uses visual cues like cards or notes to manage workloads and optimize workflow. Kanban focuses on limiting work-in-progress to avoid bottlenecks. Teams use physical or online Kanban boards to visualize workflows, track work status, and improve processes through metrics like throughput and work-in-progress. Setting up Kanban involves mapping current workflows, visualizing work, focusing on continuous flow, and limiting work-in-progress using work-in-progress limits.