In Kubernetes, there are out-of-the-box resources and objects available, such as pod, deployment, configmap, secrets, and many more; however, Kubernetes gives the ability to extend the Kubernetes API and create a new resource type other than what is available. Why would you want to create a new resource type? If you have a use case that has not been covered by any of the existing resource types, you can create a new resource as per your specific requirements. For instance, you need to implement GitOps within Kubernetes; in such cases, you can create your own controller.