It allows the shocks to be controlled at a much higher frequency, 500Hz vs 30Hz. In other words, the shocks are receiving data from the dynamic control module about 15+ times as fast/often, which provides much more control over the shocks, and the EClik uses values outside if the factory mapping. EClik or DSC controllers do what an ecu tune does for power, it gets the most possible performance out of your stock hardware utilizing just software changes.
Being able to control the valving based on all the metrics canbus is monitoring allows you to tune the suspension performance and behavior with no changes to the dampers themselves.