The Sabre GDS system is a global distribution system used by travel agents to search and book services from airlines, hotels, and other travel providers, enhancing travel management and customer service. It offers integration options, including Sabre GDS software and XML APIs, allowing travel agencies to access real-time pricing and a wide range of travel content. Key benefits include instant booking, comprehensive reporting, and a commission-free structure, making it a valuable tool for both B2B and B2C business models in the travel industry.