Abstract: The Standard Model (SM) of particle physics is one of the most complete theories in science with a hugely successful predicting power. However, it is unable to explain critical observed phenomena, such as the dominance of matter over antimatter in the universe, and thus needs to be extended. Rare decays of b quarks are very sensitive to the existence of New Physics. In this seminar, I will review recent results of differential decay probabilities, angular analyses and lepton universality tests performed by the LHCb collaboration. Moreover, I will present the recently upgraded LHCb detector and trigger systems, and the prospects for future measurements with the upcoming Run 3 dataset.