Ngo Bao Chau's Theorem is a significant result in the field of mathematics, specifically in the area of number theory and algebraic geometry. It provides a solution to the Langlands Program, which seeks to connect number theory with geometry and representation theory. The theorem addresses the properties of certain types of automorphic forms and their connections to Galois representations. The theorem was proven by Ngo Bao Chau, a Vietnamese mathematician, in 2009. His work has had a profound impact on the understanding of the relationships between different mathematical structures, leading to new insights and advancements in various areas of mathematics.