General Relativity, formulated by Albert Einstein in 1915, is a fundamental theory in physics that describes the gravitational force as a curvature of spacetime caused by mass. It revolutionized our understanding of gravity, moving away from the Newtonian perspective and providing a more comprehensive framework for understanding the universe. This theory has profound implications, including the prediction of phenomena such as black holes, gravitational waves, and the expansion of the universe. General Relativity has been confirmed through numerous experiments and observations, making it a cornerstone of modern astrophysics and cosmology.