  Weak decays and mixing of B-hadrons play a special role in our understanding
of the physics of the Standard Model and beyond. The measured amplitudes,
however, result from a complicated interplay of weak and strong interaction
effects. Understanding strong interaction dynamics, which becomes simpler for
heavy quarks, is thus a fundamental part of the game. In this review, several
theoretical aspects of B dynamics which are relevant for current and future
experimental measurements are discussed.
