The Langevin Equation is a mathematical model used to describe the motion of particles in a fluid, accounting for both deterministic forces and random fluctuations. It combines Newton's laws of motion with a stochastic term that represents the effects of thermal noise, making it particularly useful in statistical mechanics and Brownian motion studies. This equation helps scientists understand how particles behave in various environments, such as in biological systems or colloidal suspensions. By incorporating randomness, the Langevin Equation provides insights into diffusion processes and the dynamics of systems far from equilibrium.