  It has been five years since the data sample from the LHCb detector, the
first experiment optimized for heavy-flavor physics studies at a hadronic
collider, was completed. These data led to many major discoveries in exotic
hadron spectroscopy, which we review in this article. We supplement the
experimental results with a selection of phenomenological interpretations. As
the upgraded LHCb detector is expected to collect a larger data sample starting
in 2024, the near- and further-future potential of the LHCb program in exotic
hadron physics is also discussed.
