Why is superheated steam preferred in a turbine?

among other things, to improve thermal efficiency and minimize ( transmission losses) as the steam cycles through the turbines, these are often l00% Heavy Duty cycles as in Powerhouse service and Nuclear submarines.

turbines use superheated steam in order to avoid condensation inside, and, as a result, erosion of the blades. Superheated steam also contains more potential energy (expressed as an enthalpy).