Deploying a to-do application to Kubernetes using Harness involves setting up a CI/CD pipeline and configuring Kubernetes clusters to ensure efficient application management. Harness, a modern software delivery platform, simplifies the process by enabling continuous integration and delivery, critical components of the DevOps methodology. This guide uses a simple to-do application to demonstrate deployment, taking advantage of microservices and containerization technologies inherent in cloud-native solutions like Kubernetes. The tutorial provides step-by-step instructions on cloning a repository, installing dependencies, and running applications, as well as configuring deployment and service YAML files for Kubernetes. Harness's intuitive interface facilitates effortless CI/CD setup, requiring users to install a Delegate for connectivity, and configure both the testing and deployment stages, allowing developers to manage software delivery seamlessly.