Setting, so the audience can see what is happening in the background and to know what's going on.
Time, so the audience can know what time it is like either caveman or futuristic style.
Sequence, so the audience know's how long or etc it is... "an arrangement of two or more things in a successive order.
the successive order of two or more things. ...
a sequentially ordered set of related things or ideas.
an action or event that follows another or others.
a. ...
music. ...
mathematics. ...
a section of a film constituting a single continuous uninterrupted episode."
