Continuous Integration and Continuous Deployment (CI/CD) are integral components of modern software development, offering a streamlined and automated approach to building, testing, and deploying applications. CI focuses on integrating code changes into a shared repository, running builds, and conducting automated tests to ensure code quality and functionality, thereby reducing bugs and facilitating faster code integration. CD takes the tested and verified application from CI and automates its deployment to production, minimizing human error and accelerating time to market. The CI/CD pipeline includes stages such as source control, building, testing, and deployment, and can follow various configurations like basic, DAG, or multi-project pipelines to suit complex workflows. Trends such as GitOps, AI/ML integration, shift-left security, containerization, and Infrastructure as Code (IaC) are shaping the evolution of CI/CD, while challenges like cultural shifts, initial setup complexities, and security concerns persist. As CI/CD practices continue to advance, they are expected to incorporate more AI-driven processes, adapt to edge computing, and emphasize sustainability, ultimately enhancing the speed and reliability of software delivery.