Continuous Integration / Continuous Deployment (CI/CD) automates the pipeline from writing code to delivering it to users. In CI, developers merge changes frequently into a shared repository. Each merge triggers automated builds and tests. If something breaks, the team knows exactly which change caused it. In CD, passing builds are automatically packaged and deployed through staging environments to production without manual intervention. CI/CD exists because manual deployment is slow, error-prone, and does not scale. Without automation, teams batch changes into large releases that take weeks to test and deploy. Bugs compound. Integration conflicts pile up. CI/CD replaces this with rapid feedback loops. Build breaks are caught immediately. Changes ship individually. Organizations using CI/CD release features, security patches, and bug fixes many times per day. GitHub Actions, GitLab CI, Jenkins, and CircleCI are the most common tools. The consistent, scripted process reduces human error, improves auditability, and supports blue-green and canary deployment strategies.
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