Magnons are collective excitations of electron spins in a magnetic material, often observed in ferromagnets. They represent a type of quasiparticle, which means they behave like particles but are actually a result of the collective behavior of many spins. Magnons can carry energy and information, making them important for understanding magnetic properties and phenomena in materials. In addition to their role in fundamental physics, magnons have potential applications in spintronics, a field that seeks to use the spin of electrons for information processing. This could lead to faster and more efficient electronic devices, as magnons can be manipulated with lower energy compared to traditional charge-based methods.