Electrical insulators are materials that do not allow electric current to flow through them easily. They are used to protect us from electric shock and to ensure that electricity travels along the intended paths in circuits. Common examples of insulators include rubber, glass, and plastic. These materials work by having tightly bound electrons that do not move freely, preventing the flow of electricity. Insulators are essential in various applications, such as in power lines, where they keep the electrical current contained and away from the surrounding environment, ensuring safety and efficiency.