The Higgs boson is the missing link of the Standard Model of elementary
particle physics. We review its decay properties and production mechanisms at a
future e^+ e^- linear collider and its e^- e^-, e^+- gamma, and gamma gamma
modes, with special emphasis on the influence of quantum corrections. We also
discuss how its quantum numbers and couplings can be extracted from the study
of appropriate final states.Comment: 23 pages (Latex), 15 figures (Postscript), to appear in Int. J. Mod.
Phys.
