The improper use or disclosure of Personally Identifiable Information (PII) falls under the category of compliance because organizations are required to adhere to laws and regulations that protect the privacy and security of PII. This includes following guidelines set forth by privacy laws such as GDPR, HIPAA, and others that mandate the proper handling of personal data to prevent misuse and unauthorized access123.
References := Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS), Personally identifiable information (PII): What it is, how it's used, and how to protect it, What is PII? Examples, laws, and standards, Overview of the Privacy Act: 2020 Edition