Photonic decay of the Higgs boson is one of the most prominent decay modes for the observation and measurement of the Higgs boson properties, although its rate is as low as 0.002. The CMS collaboration has analyzed 35.9fb$^{-1}$ of proton-proton collision data delivered by LHC at the center of mass energy of 13~TeV. The inclusive results of the search in different Higgs production mechanisms and the differential fiducial cross section measurement results are presented in this talk.
Bakhshiansohi, H., & CMS Collaboration. (2018). Latest results on Higgs $\to\gamma\gamma$ in the CMS experiment. CERN Proceedings, 1, 235. https://doi.org/10.23727/CERN-Proceedings-2018-001.235 (Original work published 2018)