Electroactive polymers (EAPs) are materials that change shape or size when an electric field is applied. This unique property allows them to act like muscles, making them useful in various applications, including robotics, sensors, and actuators. EAPs can be made from different types of polymers, which can be either conductive or non-conductive. These materials can respond to electrical signals in different ways, such as bending, stretching, or contracting. This versatility makes EAPs valuable in fields like biomedical engineering, where they can be used in prosthetics or artificial organs, and in smart materials that adapt to their environment.