Source: Kanban Wikipedia
Kanban is a method for managing knowledge work with an emphasis on just-in-time delivery while not overloading the team members. This approach presents all participants with a full view of the process from task definition to delivery to a customer. Team members pull work from a queue.
Kanban in the context of software development can mean a visual process-management system that tells what to produce, when to produce it, and how much to produce – inspired by the Toyota Production System and by Lean manufacturing.