GitOps is a Continuous Delivery strategy where our infrastructure and application configuration are defined as code and stored centrally in a version control system like Git. It uses Git as a single source of truth, meaning it relies on the version control system to configure your infrastructure and applications. In a traditional DevOps CI/CD pipeline, an external tool like Jenkins is responsible for applying Kubernetes manifests into the cluster, but in a GitOps workflow, an agent installed in the cluster checks the Git repository for changes and updates the cluster accordingly. This approach allows for faster and safer deployments, ease of performing rollbacks, better traceability, and easier elimination of configuration drifts. ArgoCD is an open-source tool that enables GitOps continuous delivery for Kubernetes, allowing developers to define their application configuration as code in a Git repository and have ArgoCD update the cluster to match the defined configuration. It also allows multiple clusters to be managed with a single installation. The tutorial covers installing ArgoCD, deploying applications using different strategies such as declarative approach, helm, and command line tool, and understanding some key concepts like application health and sync strategies.