The organization monitors how customers perceive the extent to which their needs and expectations are being met, and decides how that information is gathered, monitored and reviewed. Possible sources include surveys and meetings with customers, feedback on products and services delivered, analysis of market share, compliments, warranty claims and reports from dealers.
This control maps to 14 controls across 11 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.