I want to know the ionicmobility definitionin electrochemistry?

@ shahbaz 
ionic mobility has a very simple meaning in electrochemistry , 
when some electrolytes are dissolved into a aqueous solution , then they will dissociate and generate ions which are responsible for the conduction of electricity , 
these ions will move towards (migrate ) to their respective electrodes (cathode or anode ) depending upon their charges , 
so, these movement of ions to their respective electrodes is known as the ionic mobility . 
HOPE IT CLEARS YOUR DOUBT .