Z boson decays refer to the processes by which the Z boson, an elementary particle that mediates the weak nuclear force, transforms into other particles through the weak interactions. These decays are important for understanding the properties of the Z boson and for testing the predictions of the Standard Model of particle physics. By studying the different decay channels of the Z boson, researchers can gain insights into the fundamental interactions between particles and the underlying symmetries of the universe. Various experimental studies have been conducted to measure the branching ratios and properties of Z boson decays, providing valuable information for the field of particle physics.