CI/CD (Continuous Integration/Continuous Deployment) refers to practices that automate the integration and deployment of code changes. Continuous Integration involves regularly merging code changes into a shared repository and automatically running tests to detect issues early. Continuous Deployment extends this process by automatically deploying tested code changes to production environments. CI/CD aims to reduce integration problems, improve code quality, and accelerate the release cycle. Tools like Jenkins, GitLab CI, CircleCI, and Travis CI are commonly used to implement CI/CD pipelines, enabling seamless and reliable software delivery.