In 2016 the LHCf experiment has fulfilled its original goal
of measuring the spectra of the neutral particles produced in the very
forward direction at LHC at the highest energy ever available. The
main purpose of these measurements is indeed to provide the Cosmic Ray
and High Energy Physics communities with a missing unique set of
information for the improvement of the hadronic interaction models
used to simulate air showers development produced in the interaction
of primary High Energy Cosmic Rays (HECR) with the Earth
atmosphere. The last data sets collected by the LHCf experiment have
been obtained during p+p collisions, at an energy of 13 TeV in the CM
frame, and p+Pb collision, at an energy of the colliding nucleon pair
of 5.2 TeV and 8.1 TeV in the CM frame. A review of the main results
of LHCf and of the recent and on-going activities are presented.