What are insulators primarily used for in terms of electricity?

Insulators are primarily used to prevent the flow of electricity, which is why materials with little to no ability to conduct electricity are categorized as insulators. These materials, such as rubber, glass, and plastic, are essential in electrical applications because they effectively restrict the movement of electric charge. This property makes them ideal for coating wires and other electrical components, ensuring that the electricity flows through the intended pathways without leaking or causing short circuits. By minimizing electric currents in unwanted areas, insulators play a crucial role in the safety and efficiency of electrical systems. This fundamental characteristic of insulators is what distinguishes them from conductors, which facilitate electrical flow, and semi-conductors, which have intermediate properties.