The Grand Unified Theory (GUT) is a theoretical framework in physics that aims to unify the three fundamental forces of the Standard Model: the electromagnetic force, the weak nuclear force, and the strong nuclear force. By combining these forces into a single theoretical model, GUT seeks to explain how they interact at high energy levels, particularly during the early moments of the universe. GUT is an important step toward a more comprehensive theory known as the Theory of Everything, which would also include gravity. While GUT has not yet been experimentally confirmed, it provides a foundation for understanding the fundamental interactions that govern the behavior of matter and energy in the universe.