Continuous Delivery automates the next phase following Continuous Integration, which is deployment. With Continuous Delivery, each time a new build artifact is available, the artifact is automatically placed and deployed in the desired environment.
This means that after a new feature has been integrated and tested in the CI (Continuous Integration) stage, a build of this code version is created and made available in a specific environment during the CD (Continuous Delivery) stage.
Continuous Delivery describes the automation step following Continuous Integration. You can learn more about the differences here.