Continuous Integration (CI) and Continuous Delivery (CD) are methodologies aimed at streamlining the software development process by enabling frequent code changes and ensuring that these changes integrate smoothly into a shared repository. Continuous Integration involves the regular merging of code changes by developers into the main branch, which is verified through automated test cases and build sequences to detect early bugs and reduce defects. Continuous Delivery extends this by ensuring that any code changes can be safely and quickly deployed to production, emphasizing automation to minimize risk and downtime, and focusing on maintaining high application quality through enhanced testing practices. Both CI and CD aim to improve efficiency, transparency, and cost-effectiveness in the development lifecycle while fostering a collaborative team environment that incorporates frequent user feedback. These practices are supported by various tools like Jenkins, Travis CI, and GitLab, and adhere to best practices such as maintaining a central repository, automating deployments, and testing in production-like environments.