Robots are machines that are programmed to perform tasks without human assistance. They were first used in ancient Greece and Egypt to perform manual labor. Today, robots are used in many fields to assist humans. They are used in medicine to perform complex surgeries, in the military to reduce human casualties during war, for domestic tasks like cleaning, and in factories for dangerous industrial work. While robots have advantages like accuracy and efficiency, they also have limitations such as high costs and an inability to be creative or make independent decisions.