Definitions

1. https://en.wikipedia.org/wiki/Continuous_integration
2. https://en.wikipedia.org/wiki/Continuous_delivery
3. https://puppet.com/blog/continuous-delivery-vs-continuous-deployment-what-s-diff
4. https://en.wikipedia.org/wiki/Continuous_testing

Continuous deployment is the next step of continuous delivery: Every change that passes the automated tests is deployed to production automatically. Continuous deployment should be the goal of most companies that are not constrained by regulatory or other requirements.