Particle physics studies the basic elements of matter and the interactions among them. It aims to uncover the most fundamental laws that control the make-up of the physical universe. The Standard Model (SM) of particle physics provides theoretical framework describing electromagnetic, weak and strong interactions of the fundamental matter constituents. The legacy of SM rests on a large amount of experimental tests that indicate the couplings of matter particles (fermions: quarks and leptons) and force mediators(bosons) are precisely described by the SM, and confirm that Electroweak (EW) symmetryis preserved. However, it is also clear that this symmetry must be broken, as it forbids masses for all fermions and electroweak bosons. In SM, EW symmetry is broken spontaneously via Higgs mechanism whereby particles acquire masses through their interaction with the Higgs field. The Higgs boson – physical particle associated with the Higgs field – was discovered in 2012 by the Atlas and CMS collaborations at Large Hardon Collider (LHC, CERN). Since its discovery, all measurements of the boson’s properties agree with the SM predictions within their relatively large uncertainties. However, it is not yet known whether the observed boson is solely responsible for EW symmetry breaking, orif it is part of a broader picture of physics beyond the Standard Model. This broader picture can manifest itself through the production of new particles and/or through new types of interactions that are subject of active searches in proton-proton collisions at LHC.