Argo CD is a declarative continuous delivery tool for Kubernetes applications that follows the GitOps approach to manage and deploy Kubernetes clusters. Whenever changes are made to the application configuration in Git, Argo CD compares them with the running application's configuration and alerts users to synchronize the desired and live states. Argo is a graduated CD project of Cloud Native Computing Foundation’s (CNCF), comprising Argo CD, Argo Workflow, Argo Rollouts, and Argo Events. Each addresses specific challenges in agile development, enhancing the scalability and security of Kubernetes application delivery.