This document discusses how to discover and classify personal data in databases. It defines personal data as any data that can identify a specific person, such as names, emails, and phone numbers. Classifying data involves labeling it into predefined categories like public, private, or sensitive to comply with regulations and protect personal information. Different organizations and regulations have their own classification schemes, but common ones include levels for public, proprietary, confidential, and sensitive data. Personal data can exist in various database tables beyond just customer or employee records.