They are used to evoke feelings of tension and fear in audiences, to drive the plot of a film, or to create a sense of another time or place. (politics.co.uk)
The design was such that every area of the game meant something and had a purpose involving driving the plot forward. (snackbar-games.com)
This is not a story driven plot, but rather, a collection of charming and amusing moments that, when added up for the duration, becomes something quite substantial. (qwipster.net)