This document discusses Kubeflow operators and how they enable Kubeflow to support multiple machine learning frameworks like TensorFlow, PyTorch, MXNet, and Chainer. It explains that operators and custom resource definitions (CRDs) allow ML jobs to be defined and managed for different frameworks. It provides examples of how jobs are defined for TensorFlow using TFJobs and for Chainer using ChainerJobs. It also summarizes how operators work by expanding the custom resources into Kubernetes objects like pods, services, and statefulsets.