2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/195856Semileptonic decays of the B mesons provide an excellent probe for the weak and strong interactions of the bottom quark. The large data samples collected at the B Factories have pushed the experimental studies of the semileptonic B decays to a new height and stimulated significant theoretical developments. I review recent progresses in this fast-evolving field, with an emphasis on the determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |Vub|.16 pages, 4 figures, accepted by Mod. Phys. Lett. AHigh Energy Physics - Experimenttext