Jet fragmentation is a research area in particle physics that focuses on the study of high-energy jets of particles produced in collisions at particle accelerators. These jets are typically produced during the fragmentation of a high-energy quark or gluon into a shower of particles. Research in jet fragmentation aims to understand how these jets are formed, how they evolve, and how they can be used to study the properties of the particles that produced them. This research is important for understanding the fundamental forces and particles that govern the universe.