The document discusses continuous delivery as a way to smoothly and automatically deploy systems from a developer's computer to a live system. It is linked to but distinct from DevOps and continuous deployment. Key aspects of continuous delivery include source control, automated testing, continuous integration, and automated deployment through a deployment pipeline that takes a developer's change and moves it live. The document provides an example of adding a new description field to an account, editing it, and deploying the change through a continuous delivery pipeline.