Line Follower is a robot or system that can automatically follow a line on the ground. The line is usually black on a white surface (or white on black). It uses infrared (IR) sensors to detect the difference in color.

When the sensor detects the line, the microcontroller controls the left and right motors to keep the robot on track. If one sensor moves away from the line, the robot adjusts its direction to return to the path.

Line follower robots are commonly used in robotics learning because they help students understand programming logic, sensor reading, and motor control.