The document discusses keys to building successful online experiences with CARS (Customized, Aggregated, Relevant, Social) attributes. It identifies four keys from interviewing companies that created innovative CARS experiences: 1) Start with consumers' needs rather than capabilities. 2) Make aggregation central to strategy. 3) Involve IT developers in strategy and design. 4) Introduce innovations carefully to gain stakeholder acceptance. Case studies from companies like USAA, Fidelity, and Yellow Book illustrate applying these keys.