CP violation refers to the phenomenon where the laws of physics do not treat matter and antimatter equally. Specifically, it involves a difference in behavior between particles and their corresponding antiparticles when both charge (C) and parity (P) symmetries are considered. This asymmetry is crucial for understanding why our universe is predominantly made of matter rather than antimatter. The discovery of CP violation in certain particle decays, particularly in K mesons and B mesons, has significant implications for particle physics and cosmology. It suggests that the processes governing the early universe may have favored the production of matter, leading to the matter-dominated universe we observe today.