The document discusses how companies can use the "voice of customers" (VoC) to inform their product development process. It recommends gathering customer feedback at each stage of development, from initial ideation through quality assurance testing and ongoing improvements. Customer insights should be obtained through polls, feedback mechanisms, usability testing of prototypes, and issue tracking to ensure products meet customer needs and retain their loyalty over time. Acting on VoC in a timely manner is critical for product success.