Sensitivity labels are one way that data classification can be applied to files and documents. Aside from labels built into Microsoft 365, you can define custom labels and apply them to documents manually or automatically via rules. In this lesson, we create a sensitivity label and apply it to a document and then change that document's label. Labels are embedded in documents allowing classification to follow a document from one domain or file system to another. We look at how label embedding is achieved. Finally, we see how to integrate MS365 sensitivity label functionality with Azure AD groups and sites.