The PCI DSS Self-Assessment Questionnaire (SAQ) is a crucial tool for businesses handling payment card data, helping them assess their compliance with Payment Card Industry Data Security Standards (PCI DSS). It is required for businesses to ensure they are implementing proper security controls to protect cardholder data and prevent breaches.

By completing the SAQ, organizations can identify vulnerabilities, implement necessary measures, and demonstrate compliance to acquiring banks or payment processors, all without needing a formal third-party audit. Compliance is vital to avoid fines and ensure data protection.