Hadron spectroscopy is a research area in particle physics that focuses on the study of the properties and behavior of hadrons, which are composite particles made up of quarks and gluons. This field aims to understand the structure and interactions of hadrons, such as protons, neutrons, and mesons, through measurements of their mass, spin, and decay patterns. Researchers use experimental techniques, such as colliders and detectors, to study the spectrum of hadrons and uncover new particles and states that can further our understanding of the strong nuclear force. Hadron spectroscopy plays a crucial role in advancing our knowledge of the fundamental building blocks of matter and the fundamental forces of nature.