As we go from the equator to the poles, the value of `g`

As we go from equator to the poles the value of g :

As we go from equator to pole, what happens to value of 'g'?

Earth can be treated as a sphere of radius R and mass M. The acceleration due to gravity at Earth's surface is g. If we move from equator to pole, the value of g.

As we go from pole to the equator, the effective value of acceleration due to gravity decreases due to