Step Response is the response of a control system when the input changes suddenly from zero to a constant value, typically represented by a unit step input $R(s)=1/s$. It is one of the most commonly used methods for analyzing the time-domain performance of a control system. The step response shows how the system output changes with time and helps evaluate characteristics such as rise time, peak time, settling time, maximum overshoot, and steady-state error. A well-designed system generally reaches the desired final value quickly, with acceptable overshoot and minimal oscillation.