DarkSide-20k is a direct dark matter search experiment located at Laboratori Nazionali del Gran Sasso (LNGS). It is designed to reach an exposure of 200 tonne-years free from instrumental backgrounds. The core of the detector is a dual-phase Time Projection Chamber (TPC) filled with 50 tonnes of low-radioactivity liquid argon. The TPC is surrounded by a polymethylmethacrylate (PMMA), which acts as a neutron veto, immersed in a low-radioactivity liquid argon bath enclosed in a stainless steel vessel, placed inside a proto-dune like cryostat. Readout systems consist of large-area Silicon Photomultiplier (SiPM) array detectors. DarkSide-20k aims to reach a dark matter-nucleon cross-section sensitivity of $ 7.4 \times 10^{-48} \textrm{cm}^{2}$ at 90\% confidence level for a dark matter mass of 1 TeV/c$^{2} $ in a 200 tonne-year exposure. This paper will give an overview of the status of construction and the physics program of the project.