Kubernetes Annotations and Labels: What’s the Difference?` In Kubernetes, both labels and annotations are used to attach metadata to objects. While they can be used together, labels are intended for identifying attributes of objects meaningful to users, whereas annotations are for attaching arbitrary non-identifying metadata that humans want to know about a resource. The main difference between labels and annotations lies in their purpose: labels are for Kubernetes to group related resources, while annotations are for human consumption. Labels have constraints on their length and content, making them suitable for efficient queries by Kubernetes, whereas annotations have no such constraints, allowing humans to add arbitrary metadata without affecting the core system's functionality.