  In 2018 the Belle II experiment, aimed at detailed studies of B-mesons,
started operation at the electron-positron collider SuperKEKB at KEK (Japan).
This was preceded by a long and quite successful work of the B-factories of
previous generations, including the Belle experiment for which Belle II is a
successor. This experiment is unique and has no analogues or competitors in the
world. The spectrum of problems it is aimed at is quite broad: from studies of
hadronic states containing heavy quarks to precision measurements and searches
for New Physics beyond the Standard Model. This review describes specific
features of the Belle II experiment, its ambitious goals and specific tasks,
expected results of its work and the hopes related to its successful
accomplishment.
