Majorana neutrinos are a type of neutrino that are their own antiparticles. This means that they can annihilate with themselves, unlike other neutrinos, which have distinct antiparticles. The existence of Majorana neutrinos could help explain the imbalance between matter and antimatter in the universe. The study of Majorana neutrinos is important in the field of particle physics and has implications for neutrino mass and lepton number violation. Detecting these neutrinos could provide insights into the fundamental laws of physics and the origins of the universe.