Continuous delivery is the ability to deliver changes (such as new features, configuration changes, bug fixes, and so on) into production safely and quickly in a sustainable way.
Of course, achieving this comes at a price. The entire delivery process (from development to production) must be highly automated. Remember, humans are good at creative tasks but horrible at repetitive tasks. Machines are horrible at creative tasks but excellent at repetitive tasks. Why not take advantage of both humans and machines? In other words, let humans and machines do what they do best! ...