Gauss's law for gravity is a law that states that the force of gravity pulling on an object is related to how much mass is nearby. This law helps us understand how gravity works. Think of it like this: If you were standing in a room that was empty, not many things would be pulling on you, and so you wouldn't feel very much gravitational force. If you added more and more people to the room, then you would start to feel more and more pull from the people's mass, and so the gravitational force would increase.