The Payment Card Industry Data Security Standard (PCI DSS) is a set of security guidelines designed to protect sensitive payment card information. Established by the Payment Card Industry Security Standards Council, it aims to ensure that all companies that accept, process, or store credit card data maintain a secure environment. Compliance with these standards helps prevent data breaches and fraud. PCI DSS includes requirements for secure network architecture, encryption of cardholder data, and regular security testing. Organizations must regularly assess their security measures and implement necessary changes to safeguard customer information. Adhering to PCI DSS is essential for maintaining trust and security in the payment card industry.