What is the Vsse value?

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Vsse is the stall speed in the landing configuration, with the landing gear down and flaps extended. It represents the minimum steady airspeed at which the airplane can remain controllable in that configuration before the wing stalls. For this aircraft, the published Vsse is 110 knots, so that speed is the one you would use for planning when in the landing configuration. The reason this value is higher than the clean-stall speed is that extending flaps and gear changes the wing’s aerodynamics and the airplane’s overall stability, requiring a bit more speed to avoid stalling once you’re configured for landing. The other speeds correspond to different configurations and do not match the landing-configuration stall speed.