This article talks about the label standard and best practices for Kubernetes security. It is a common area where I see organizations struggle to define the set of labels required to meet their security requirements. My advice is to always start with a hierarchical security design that can achieve your enterprise security and compliance requirements, then define your label standard in alignment with your design. Label prefixes can be used to identify label classification. Label labels are key/value pairs that are attached to objects to identify attributes that are required for specific purposes, such as inventory reporting.
Source: https://www.helpnetsecurity.com/2021/05/26/kubernetes-security/