Step 1: Understand that a PID controller is a tool used in control systems.
Step 2: Know that PID stands for Proportional, Integral, and Derivative.
Step 3: Recognize that the main goal of a PID controller is to reduce errors in a system.
Step 4: Learn that 'steady-state error' is the difference between the desired value and the actual value when the system is stable.
Step 5: Realize that the PID controller adjusts the output to minimize this steady-state error.
Step 6: Understand that it does this by using three components: Proportional (P) reacts to current error, Integral (I) considers past errors, and Derivative (D) predicts future errors.
