  Various aspects of the Higgs boson phenomenology of the Minimal
Supersymmetric Standard Model (MSSM) are reviewed. Emphasis is put on the
effects of higher-order corrections. The masses and couplings are discussed in
the MSSM with real and complex parameters. Higher-order corrections to Higgs
boson production channels at a prospective e+ e- linear collider are
investigated. Corrections to Higgs boson decays to SM fermions and their
phenomenological implications for hadron and lepton colliders are explored.
