  Hadronic decays and transitions are a key ingredient of hadronic physics. I
discuss how hadronic decays can be explored in lattice gauge theory and review
studies undertaken. I also discuss the impact of decays on masses and how
lattice studies can explore the nature of a hadronic state: namely whether it
is a molecular or quark-antiquark state. A brief discussion of lattice
exploration of pentaquark states is presented.
