Hilton has implemented a CRM system called Hilton OnQ to consolidate customer data and improve the guest experience. The system segments customers into four categories based on loyalty and spends data. It aims to recognize, personalize experiences for, and analyze individual customers. While the CRM system has helped Hilton outperform competitors, limitations include challenges in accurate data transfer and high operating costs. The document recommends optimizing internal management, utilizing big data and social media to improve personalization, and enhancing the mobile app and online travel partnerships to strengthen Hilton's CRM system.