Explain what it means to use labels (tags) in a system or application

Labels (tags) are key-value pairs that can be assigned to objects in systems or applications for identification, classification, and management.

Examples of usage:

• In Docker, labels help describe containers, images, for example, indicating version, author, environment.
• In Kubernetes, labels are used to select groups of pods or services.
• In monitoring or logging systems — for filtering and searching.

Labels facilitate automation and organization, allowing quick finding and management of resources without changing their internal state.