Why did the addition of potassium thiocyanate cause the equilibrium to shift the way it did which ion causedthis shift?

The addition of potassium thiocyanate (KSCN) introduces thiocyanate ions (SCN⁻) into the equilibrium system. According to Le Chatelier's principle, the equilibrium will shift to counteract the increase in SCN⁻ concentration, often favoring the formation of products if SCN⁻ is a reactant in the equilibrium. This shift occurs because the system seeks to re-establish equilibrium by reducing the concentration of the added ion.