What is the purpose of the 'apiVersion' field in a YAML manifest?

The apiVersion field in a YAML manifest specifies the version of the Kubernetes API that you are using to create or manage the resource. It indicates which version of the API should be used to interpret the manifest and ensures compatibility with the features and behaviors of that specific version. This is important because Kubernetes evolves over time, and different API versions may support different features or have different behaviors.