The ARGO-YBJ experiment, installed at the Yangbajing Cosmic Ray Laboratory (Tibet,
China), at 4300 m a.s.l., is a detector 100x110m2 large, made by a layer of Resistive Plate
Counters (RPCs) consisting of a central carpet with almost full coverage extending over an area
of about 5.500 m2, surrounded by a guard ring with partial coverage. The high space-time
granularity, the full-coverage technique and the high altitude location make this detector a
unique device for a detailed study of the atmospheric shower characteristics with an energy
threshold of a few hundred GeV. These properties in addition to the large field of view and the
high duty cycle enable the ARGO-YBJ experiment to monitor the sky in a continuous way.
Results have been reached in a wide variety of fields ranging from Gamma Astronomy, to Solar
Physics, from Cosmic Rays composition to hadronic interactions and proton-antiproton ratio. A
summary of all these results will be presented and reviewed
