The finite element method (FEM) is a numerical technique used to solve complex engineering and mathematical problems by dividing them into smaller, simpler elements. These elements are then connected together to form a larger system, with each element representing a small part of the overall structure. By applying mathematical equations to each element and considering their interactions, FEM can accurately simulate and analyze the behavior of a wide range of physical systems, including structures, heat transfer, fluid flow, and electromagnetic fields. FEM is widely used in various fields such as structural engineering, civil engineering, mechanical engineering, and aerospace engineering to optimize designs, predict performance, and solve real-world problems.