Harness CD's YAML-first approach streamlines pipeline creation by allowing developers to define deployments with clarity and efficiency through structured YAML configurations, focusing on defining what, where, and how to deploy. The blog post elaborates on the process of creating a simple Continuous Deployment (CD) pipeline using YAML, detailing key concepts such as pipelines, stages, services, infrastructure, and execution. A pipeline is described as an end-to-end process that can include various stages like integration, delivery, and monitoring. Stages are subsets of a pipeline for specific tasks, while services and service definitions represent microservices and their artifacts. Infrastructure and environment definitions determine deployment targets, and steps are individual operations within a stage. Connectors facilitate integration with third-party tools. The post then provides a practical example of deploying a Kubernetes manifest using YAML, outlining the process of defining pipeline metadata, adding a deployment stage, and specifying service and infrastructure details, culminating in a rolling deployment step. The article encourages readers to explore further deployment strategies like Blue-Green and Canary Deployments, and invites them to learn more about Harness through available resources and demos.