To strive towards continuous delivery, your organization will need to compile multiple tools to drive workflow automation.
In fact, according to the CALMS approach (Culture, Automation, Lean, Measurement, Sharing) used in the integration of DevOps teams, tools have a big impact on automation, lean, and measurement.
Automation is used to manage the process of developing a feature all the way through operational deployment of that feature. It removes key human interactions that can be fraught with mistakes and slow down the process.
Mature workflow automation efforts can enable a team to spin up an environment, develop, and release code within hours, if not minutes.