A robot arm is a type of mechanical device designed to mimic the movements of a human arm. It consists of joints and links that allow it to move in various directions, making it useful for tasks such as assembly, welding, and painting. Robot arms are commonly used in manufacturing and industrial settings to increase efficiency and precision. These robotic devices can be programmed to perform specific tasks and can be equipped with different tools or end effectors, such as grippers or welders. They are often controlled by computers or robotic controllers, allowing for automation in various applications, from automotive production to medical surgeries.