Quantum chromodynamics (QCD) is the theory that describes the strong interaction between quarks and gluons, fundamental particles in the universe. It began to take shape in the 1970s, with significant contributions from physicists like David Gross, Frank Wilczek, and H. David Politzer. QCD is essential for understanding the behavior of particles in high-energy physics and is studied to explore the fundamental forces that govern matter. Resources like Particle Adventure and CERN's publications provide additional insights into QCD's development and significance. The study of QCD is crucial for advancing knowledge in particle physics and the standard model.