Simply we can define the potential difference between any two points is the work done in moving a unit positive charge from one point to the other point in the presence of electric field
Potential means the Potential to move charge. Also know as "Voltage", Potential is like pressure in a fluid system. Potential difference is like a difference in pressure. Also, a difference in Voltage. In a circuit, there will be potential at one point [V1] and potential at another point [V2]. The potential between those two points is the potential difference: Vdelta = V1 - V2.
