The standard Glauber model is widely used for determination of centrality classes, for comparison of nucleus-nucleus and proton-nucleus collision with pp data and for search of collective effects. In the Modified Glauber Model (MGM) we take into account energy losses which are relevant to particle production in each nucleon-nucleon collision. MGM provides correct description of total multiplicity yields and scaling with number of nucleon-participants in nucleus-nucleus collisions from AGS to RHIC energies. MGM predictions of centrality dependence of multiplicity yields in Pb-Pb collisions at LHC were confirmed by ALICE. MGM approach was transferred to p-Pb collision and considerable stopping of nucleons was observed. Strong transformation of the behavior of multiplicity density and deviation of the scaling of soft and hard processes with number of nucleon-participants were obtained