CI/CD, or Continuous Integration and Continuous Deployment, is a set of practices and tools that enables software developers to build, test, and deploy their code changes frequently and automatically.

Continuous Integration (CI) is the practice of merging all developers’ code changes into a single codebase several times a day. This is done to detect and fix conflicts early, as well as to ensure that the codebase is always in a releasable state. To achieve this, developers typically use a version control system (such as Git) and a CI/CD tool (such as Jenkins, Travis CI, or CircleCI) to automate the process of building, testing, and deploying their code changes.

Continuous Deployment (CD) is the practice of automatically deploying code changes to a production environment as soon as they pass all tests and are deemed stable. This allows for faster delivery of features and bug fixes to customers and reduces the risk of human error during the deployment process.

Together, CI and CD automate the software development process and help teams move quickly and with confidence, by reducing the time and resources required to test and deploy code changes.