The PCI Special Interest Group (PCI SIG) is an organization focused on improving the security of payment card transactions. It brings together various stakeholders, including payment processors, merchants, and technology providers, to develop and promote standards for secure payment processing. One of the key initiatives of the PCI SIG is the creation of the Payment Card Industry Data Security Standard (PCI DSS), which outlines best practices for protecting cardholder data. By adhering to these standards, businesses can help reduce the risk of data breaches and enhance consumer trust in electronic payment systems.