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A Line Follower Robot is an autonomous robot designed to detect and follow a specific path marked by a line on the ground. The line is usually black on a white surface or white on a black surface. The robot uses sensors to continuously monitor the line and adjust its movement to stay on the path.

The robot typically uses infrared (IR) sensors to detect the contrast between the line and the background. These sensors send signals to a microcontroller such as Arduino, which processes the sensor data and controls the motors accordingly. If the robot detects that it is moving away from the line, the microcontroller adjusts the motor speeds to correct the direction.

Line follower robots are widely used in industrial automation, warehouses, and automated transport systems, where they help move materials efficiently along predefined paths. They are also commonly used in robotics competitions and educational projects to demonstrate basic concepts of robotics, sensors, and control systems.