You can think of gravity as a force that attracts objects towards each other. The more massive an object is, the stronger its gravity. This force is what keeps you on the ground and the Earth in its orbit around the Sun.

Einstein's idea was that gravity is not just a force between objects, but it is actually a bending or curving of space and time. He imagined a fabric, called spacetime, that is stretched out like a sheet. Whenever you place a massive object on this sheet, it creates a curve, or a dip in the fabric. This curving of spacetime is what we experience as gravity.

For example, the Earth is a massive object that creates a dip in the spacetime fabric. When you stand on Earth, you are essentially rolling down this dip, which makes you feel the force of gravity pulling you towards the center of the Earth.

One interesting consequence of this theory is that it can help explain the movement of objects in the universe. For example, the orbit of the planets in our solar system can be understood as them following the curved paths created by the Sun's spacetime distortion.

Another fascinating aspect of general relativity is that it predicts the existence of black holes. Black holes are extremely massive objects that curve spacetime so much that not even light can escape them. They were first predicted by the equations in Einstein's theory and have since been observed through various astronomical techniques.

In summary, General Relativity is a groundbreaking theory about the nature of gravity, which portrays it as a curvature in space and time caused by massive objects. This theory has led to fascinating insights into our universe, including the prediction and discovery of black holes.