Namespaces are a way to isolate your federated graphs and subgraphs. They are the way to group graphs in different environments, such as production and staging. For example you can have a federated graph called my-api in a production and staging namespace. All graph operations and compositions are scoped to graphs present in a particular namespace. Every organization is provided a default namespace which cannot be deleted. You can scope CLI commands to a particular namespace by passing the -n flag or default is considered.