The "First Act" refers to the initial section of a play, film, or other narrative forms, where the main characters, setting, and conflict are introduced. This part sets the stage for the story, providing essential background information that helps the audience understand the context and stakes involved. In theater, the First Act typically includes key events that propel the plot forward, leading to a climax. It often establishes the tone and style of the work, engaging the audience's interest and encouraging them to invest in the characters' journeys.