Cords and cables are essential components used to connect electrical devices and transmit power or data. They consist of insulated wires bundled together, allowing electricity or signals to flow between devices like computers, televisions, and speakers. Different types of cords and cables serve various purposes, such as charging, audio transmission, or networking. Common examples include USB cables for data transfer, power cords for supplying electricity, and HDMI cables for high-definition video and audio. Understanding the specific type of cord or cable needed for a device is crucial for ensuring proper functionality and safety.