A rock-solid script or screenplay does so much more than tell actors and narrators what to say. It is the backbone of any professional content production.

The script provides information vital to every other member in the production team: it tells producers how to budget for the work; it tells casting directors how to setup and structure effect calls-for-talent; it tells the MUAs and costumers and set designers what kinds of material they need to acquire to create the overall aesthetic of the work... the list goes on and on.