The center of gravity is the point at which the weight of an object is evenly distributed. It is the point around which the object would balance if it were suspended from a string.
In the case of a baseball bat, the mass is concentrated more in the fat end because the bat is thicker at that point. This means that the center of gravity is also closer to the fat end.
The center of gravity of a baseball bat can vary depending on the weight and thickness of the bat. However, it is generally located near the fat end.