In recent years, the ALICE experiment at the CERN LHC has published a lot of exciting
measurements aiming to characterise the properties of the Quark Gluon Plasma (QGP),
a state of matter formed in high energy collisions at extremely high temperature
and/or energy density.
ALICE has collected precision data at different energies for proton-proton (pp),
proton-lead (p-Pb), lead-lead (Pb-Pb) and xenon-xenon (Xe-Xe) collisions.
In this presentation, we will summarise the results that best represent a step forward
towards the understanding of the QGP formed at the LHC.
Emphasis will be given to recent results from the LHC run 2, spanning from the soft
sector (bulk particle production and correlations) to hard probes (charmed hadrons
and jets), and to signatures of possible collective effects in high multiplicity pp
and p-Pb collisions.