Personally identifiable information (PII), is data that is used to identify individuals. It can be information such as social security numbers, phone numbers, physical addresses or IP addresses. It can also be a combination of information types, like a birthdate, credit card number and a first and last name. Types of PII include names, work emails, personal emails, home addresses, phone numbers, gender, race, ethnicity, medical data, photographs, geolocations, medical records, and log-in credentials.