How the gravitational potential is related to potential energy?

Answer 1

When the liquid is at a height h above the surface of earth its energy per unit volume is equal to hdg . Also per unit mass it is equal to gh.

Answer 2

Gravitational potential is a measure of the gravitational potential energy per unit mass at a point in a field. The gravitational potential energy of an object at a point is equal to the product of the object's mass, acceleration due to gravity, and the height of the object from a chosen reference point. As an object moves in a gravitational field, its potential energy changes due to its position relative to the reference point.