Continuous Integration (CI): The automated building and testing of your application on every new commit.

Continuous Delivery (CD): A state where your application is always ready to be deployed. A manual step is required to actually deploy the application.

Continuous Deployment: The automation of building, testing, and deploying. If all tests pass, every new commit will push new code through the entire development pipeline to production with no manual intervention.

To learn more about continuous integration, delivery, and deployment and CircleCI please visit: https://circle.ci/3g7Zz56