Retail and e-commerce businesses process millions of payment transactions and collect extensive customer data, making them attractive targets for credit card skimming, account fraud, and supply chain attacks. PCI DSS compliance is mandatory for any business handling cardholder data. The shift to omnichannel commerce — spanning physical stores, websites, mobile apps, and third-party marketplaces — has expanded the attack surface significantly. Magecart-style attacks, credential stuffing, and loyalty program fraud remain persistent threats.