How does the gravitational acceleration experienced by a body change as it moves from the equator towards the poles?

As a body moves from the equator to the poles, the value of g experienced by the body increases.
The shape of the earth is not perfectly spherical. It is flattened at the poles and bulged out at the equator. So the earth has more radius at the equator in comparison to at the poles.

    As we know $g={\displaystyle \frac{GM}{R^2}}$, where    G is the universal gravitational constant, R is the radius of the earth, and g is inversely proportional to the radius of the earth.

We know that the radius at the equator is more so g will be less at the equator, and the radius is less at the poles so acceleration due to gravity will be more at the poles.

Hence when a body moves from the equator to the poles, the value of g experienced by the body increases.