A room-temperature superconductor is a hypothetical material which would be capable of exhibiting superconducting properties at operating temperatures above 0° C (273.15 K). While this is not strictly "room temperature" (which would be approx. 20–25 °C), it is the temperature at which ice forms and can be reached and maintained extremely easily in an everyday environment.
It is unknown whether any such material exists. The interest in its discovery arises from the repeated discovery of superconductivity at temperatures previously unexpected or held to be impossible. The potential benefits for society and science if such a material did exist are profound.