If your goals are high-velocity software outgrowth and many delivery of working builds to origination you need to automate at smallest part of the testing and delivery process. Ideally that rerises instrumenting CI/CD pipelines for your projects along with test suites to take errors precedently customers see the software and scripts that instrument the steps of the pipelines.
Continuous integration (CI) is a methodology for automating software builds packaging and tests in a congruous way. CI helps to give a team some trust that changes they check into rise code rendering control will not fracture the build or present bugs into the software. The endpoint of CI is typically a completed check-in to the main member of a software repository.
Continuous delivery (CD) automates the delivery of tested software to infrastructure environments. That doesnt usually mean throwing it straightly into origination to see if customers complain. Typically organizations set by pushing the build to a outgrowth environment. After the developers themselves beat on the new build and release it it usually goes to a test environment where it is used by a broader cluster of users (sometimes just dedicated inner testers sometimes a larger cadre of users signed up for beta testing or ’dog-fooding’) and monitored closely. Finally if all goes well the testers sign off and push the new rendering to a origination environment.
At each stage of CD there are options to return quickly to an older build and engender bug report tickets for the developers to address in the new build. The goal is not to push lots of builds into origination but rather to continuously better and enhance the software without introducing regressions. Another term for these practices is ’devops.’