A gravitational field is a region around a mass where other masses experience a force of attraction. This concept helps explain how objects like Earth pull smaller objects, such as apples, towards them. The strength of the gravitational field depends on the mass of the object creating it and the distance from that object. In a gravitational field, the force acting on an object is proportional to its mass. For example, a satellite in orbit around Earth is constantly pulled towards it by gravity, but its forward motion keeps it in a stable path. This balance between gravitational pull and motion is essential for understanding orbits.