What happen if material is place between capacitor touching neither plates?

If a material is placed between the plates of a capacitor without touching either plate, it will influence the electric field and capacitance depending on its properties. If the material is a dielectric, it can increase the capacitance by reducing the electric field strength between the plates, allowing the capacitor to store more charge. However, if the material is conductive, it may short-circuit the capacitor if it bridges the gap between the plates. If the material is non-conductive and not a dielectric, it will have little to no effect on the capacitor's performance.