Abbreviated as PII or pii, personally identifiable information is any information that can identify an individual. This type of information may be requested from users through online forms and can include your mailing address, credit card number, your IP address, phone number, e-mail address, Social Security number or any other unique identifier. Being cautious about the personally identifiable information you provide on the Internet can help reduce the risk of being a victim of identity theft. Also called personal data.
See also “Defend Yourself Against Identity Theft” In Webopedia’s “Did You Know” section.