Directors develop a vision for a film and decide how the film should look. They give life and emotions to their reel life creation. They convert a script into motion cinema, which is like converting a dream into reality.
A director improvises his ideas and architects them into real life designs, sets, characters, dialogues and story.
Modern day direction is supported by various tools:
Camera Angles:
Lighting:
Set Designing:
Editing:
Jimmy Jib:
Whistling Woods International Blog 
wow, never new jibbing as a tool. awesome!