@ angel
what u need to understand is that electropotential is same term as that of electric potential .
so, when u have placed a test charge somewhere at infinity distance in the space and u need to take that charge toi certain point without any application of external forces .
that potential diffrence applied by the charge is called as the electric or electrostatic potential .
electrostatic potential = work done (W) / TIME TAKEN (T )
its unit is joule per second , and specially this is a potential diffrence between those two points in which u are moving the charges .
HOPE IT CLEARS YOUR DEFINATION DOUBT
ALL THE BEST ..