  The role of soft gluons in inclusive collinear parton densities as well as in
Transverse Momentum Dependent (TMD) parton densities is discussed. Applying the
Parton-Branching (PBM) method, the so-called non-perturbative Sudakov form
factor could be identified with the integration range $z \to 1$, which is
neglected in collinear parton shower approaches.
  The importance of soft gluons could be shown by investigating the transverse
momentum spectrum of Drell-Yan lepton pairs, leading to a width of the
intrinsic-$k_T$ distribution which is independent on $\sqrt{s}$ , in contrast
to what is observed in parton shower approaches. The reason for this behavior
is traced back to the non-perturbative Sudakov form factor. The role of soft
gluons for observable hadron spectra is discussed and shown to be negligible.
  This talk is dedicated to the memory of S. Jadach.
