On the periodic table, silver has the highest electrical conductivity at room temperature.
Silver is a transition metal with atomic number 47 and the symbol Ag, from the Latin word argentum. At room temperature, it conducts electricity better than any other element because electrons can move through its metallic structure with comparatively low resistance.
Copper is used more widely in electrical wiring because it is much less expensive and more abundant, even though its conductivity is lower. Gold conducts less well than silver and copper, but it resists corrosion and is useful for reliable contacts in electronics.
Silver’s excellent conductivity is one reason it is used in specialized electrical contacts, printed electronics, and some solar technologies. This fact concerns electrical conductivity, not thermal conductivity, reflectivity, or total use in wiring. Those different comparisons can produce different leading materials.