  The field of exotic spectroscopy is extremely rich and productive. Several
observations and searches for pentaquark states have been performed in the last
4 years, starting from the LHCb observation in 2015. This is still quite a
recent discovery, and possibly the beginning of a new era in both observation
of new states and understanding of the QCD binding mechanisms. The most recent
results from LHCb and Belle are presented regarding measurements and searches
for charm, strange and beauty pentaquarks, along with an introduction on
phenomenology of multiquark states.
