What is a characteristic of a sensitivity label in Microsoft 365?

In Microsoft 365 information protection guidance, Microsoft explains that sensitivity labels are persistent: when a label is applied to a file or email, the label information is stored as metadata so that the protection settings “travel with the content” wherever it’s saved or shared. Labels can apply encryption, content marking (headers, footers, watermarks), and DLP-friendly metadata, but encryption is optional—some labels only classify/mark without encryption. Microsoft also emphasizes that labels are not restricted to predefined categories; administrators can create custom label names, descriptions, and scoped policies to reflect an organization’s taxonomy (for example, Public, Confidential, Highly Confidential, or industry-specific categories). Because the defining property that always applies is that the label remains attached to the content and enforces configured policy across Microsoft 365 services and supported third-party locations, the accurate characteristic is persistent. Options “encrypted” (not always) and “restricted to predefined categories” (incorrect—labels are customizable) do not universally describe sensitivity labels.