Electric Potential :
We saw in work and energy that Potential energy refer to the energy stored in a body that can be converted to a kinematic energy Here we apply the same context in electricity
So the Electric potential the electrical potential , the energy neede to move a point charge tought a distance r and it is calculated by

W: Work done to move the charge
q: the electrical charge
k: coulomb's constant
Superposition principal
The same principal apply as with force, and electrical field the potential in a field is the equal to the sum of all electrical potentials of all charges
V = V1 + V2 + V3 + ......etc