Higgs boson decays refer to the process by which the Higgs boson particle, the last missing piece of the Standard Model of particle physics, transforms into other particles. The decay of the Higgs boson is a fundamental process that allows scientists to study its properties and interactions with other particles, ultimately leading to a better understanding of the underlying mechanisms of the universe. Research in this area involves studying the different possible decay channels of the Higgs boson and measuring the rates at which it decays into different particles. This research is vital for verifying the predictions of the Standard Model and potentially uncovering new physics beyond it.