Visual servoing is a robot control technique that uses real-time visual feedback from a camera to regulate the motion of a robot toward a goal configuration. Image-based visual servoing (IBVS) minimises an image-feature error directly, while position-based visual servoing (PBVS) reconstructs 3-D pose from vision before computing Cartesian control signals. The approach is widely used in manipulation, assembly, and tracking tasks where precise end-effector placement relative to a visually perceived target is required.