Continuous integration (CI) and continuous delivery (CD) are key practices in Agile software development that help ensure code stability and faster updates to users. CI focuses on the automated testing of feature branches before merging them with the main branch, preventing the introduction of errors, while CD automates the release process, facilitating incremental updates. The process of setting up a CI pipeline using GitHub and CircleCI is demonstrated with a simple Python Flask application, encompassing steps such as creating the application, setting up virtual environments, writing tests, configuring CircleCI, and integrating with GitHub. The tutorial highlights the importance of automated testing and the benefits of a CI/CD pipeline, including improved code quality and more efficient updates, and encourages users to extend their setup by adding automated deployments to fully automate their development workflow.