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 5.2 TeV and 8.1 TeV in
the nucleon-nucleon CM frame. A review of the main results of LHCf and of the
recent and on-going activities will be presented.