PII

Plain-English explanation

PII includes data that identifies a person, such as names, IDs, emails, phone numbers, addresses, financial records, and sometimes combinations of indirect signals.

Why it matters

PII matters because it affects how AI systems are designed, evaluated, priced, or trusted. Knowing the term helps you ask better questions and avoid vague implementation decisions.

• Ask how it changes quality, cost, speed, or safety.
• Look for concrete examples in the workflow you are building.
• Document the tradeoff before choosing a tool or architecture.