Data Classification
The process in Purview of identifying and categorizing data using sensitive information types, trainable classifiers, and labels.
Data classification in Microsoft Purview underpins information protection by identifying what data is before any policy acts on it. It detects sensitive information types (pre-built patterns like credit card or Social Security numbers) and runs trainable classifiers (machine-learning models for business content such as contracts or resumes). The key exam distinction is that classification detects and categorizes content, while sensitivity labels are the mechanism that enforces protection. Content Explorer shows where classified data lives at rest, while Activity Explorer surfaces what actions users take on labeled content.
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