The Hartree method is a computational approach used in quantum chemistry to approximate the behavior of many-electron systems. It simplifies the complex interactions between electrons by assuming that each electron moves in an average field created by all other electrons. This method leads to a set of equations that can be solved iteratively to find the electron distribution and energy levels of a system. While the Hartree method provides a useful starting point, it has limitations, particularly in accounting for electron correlation effects. More advanced methods, such as Hartree-Fock and Density Functional Theory, build upon the Hartree method to improve accuracy in predicting molecular properties and behaviors.