Electrical conductance is the reciprocal of electrical resistance. From Ohm's law the resistance is defined as the ratio of the potential difference to the current produced by it in the conductor.resistance =potential difference /current.conductance = current / potential difference.
Conductance of a material gives an idea of how easily it will conduct current.
Silver has more conductance than aluminum or iron. Silver will have more current than aluminum or iron when connected to the same electric cell.