The role of a script writer, also known as a screenwriter, is to prepare stories and instructions for films, television, plays and commercials. The script writer's role is essential, as without a script writer there is no production. The script writer creates the story line, characters and dialog for any piece of staged presentation.
A script writer's focus varies depending on the medium for which the script is written. Script writers of feature films often work alone for a considerable amount of time to develop their scripts. Because a film is usually a solitary creation, there is more artistic freedom, though film scripts are often rewritten several times before production. Television script writers must focus their creativity to meet the needs of specific time slots, audiences and series parameters. In television, a team of script writers often work together to create a viable script. To write plays, a script writer must consider the limited staging area and the fact that most of the story is told in dialog.
Though some script writers are employed by film or television studios, most are freelancers. Once they turn in completed scripts, they generally have no more role in the production. However, some producers and directors prefer their presence on the set in case rewrites are necessary.