In the fourteen years since its discovery, we have made significant strides in understanding the Higgs boson and its interactions. In this seminar, I will present a new landmark result from the CMS experiment, in which measurements from multiple Higgs boson production and decay channels are combined to achieve unprecedented precision. The statistical combination is based on analyses using the full LHC Run 2 dataset (2016–2018), corresponding to 138 fb⁻¹ of proton–proton collision data. A plethora of measurements are provided, including the first combined simplified template cross section measurement from CMS, which probes the kinematic properties of Higgs boson production. The results are further interpreted within the coupling modifier and Standard Model Effective Field Theory frameworks, providing consistent approaches to search for deviations from the Standard Model. Together, these results constitute the most comprehensive study of Higgs boson production and decay performed by the CMS experiment to date, offering deeper insight into the Higgs boson and its role in the Universe.