Wave Function Methods are computational techniques used in quantum mechanics to describe the quantum state of a system. These methods rely on the concept of a wave function, which encodes all the information about a particle or a group of particles. By solving the Schrödinger equation, researchers can predict properties like energy levels and molecular structures. These methods include various approaches, such as Hartree-Fock and Density Functional Theory, which simplify complex calculations. They are essential in fields like chemistry and physics for understanding interactions at the atomic and molecular levels, enabling advancements in material science and drug design.