What is a volt ?

Hint: The potential difference between two points in a circuit is the difference in the amount of energy that charge carriers have. As charge carriers move through electrical components in a circuit, energy is passed to them.

Complete answer:
The Volt (often abbreviated to V) is the unit of electric potential difference (commonly referred to as voltage), electromotive force (commonly abbreviated to EMF), and electric potential in the world of physics. One volt is proportional to the difference in electric potentials between two given points in a wire conducting an electric current of magnitude 1 ampere and dissipating one watt of electricity between those two points, according to the International System of Units (often abbreviated to SI).

It can also be described as the potential difference that exists between two points and imparts one Joule of energy to each Coulomb of charge that passes through it. The electromotive force and electric potential difference SI units are named after Alessandro Volta, an Italian chemist and physicist.

Note: A voltmeter is a device that measures the difference in electric potential between two points in an electric circuit. It is connected in a parallel manner. It normally has a high resistance, but it just draws a small amount of current from the circuit.