'Docker' is a platform for building, shipping, and running applications efficiently. Docker separates applications from the infrastructure, enabling quick software delivery. It uses containers to create isolated environments for applications.

Containers in Docker are lightweight, including all necessary components, which ensures consistency in various environments. This feature of Docker drives its widespread adoption for scalable and quick deployments.

Docker's containerization approach brings benefits like isolation, scalability, and efficiency, streamlining development and deployment workflows for developers and organizations.