In the first part of the talk, I will introduce the idea of hexagonalization. I will explain how to compute four- and higher-points correlation functions in N=4 super-Yang-Mills by decomposing the problem into hexagon form factors which were first introduced to compute three-point functions. This is an integrability-based approach. In the second part of the talk, I will describe new developments and possible applications such as higher particles corrections and higher genus surfaces.