Linear - A straight forward story where the trailer is in chronological order. One example could be The Woman in Black. This is because it includes a flashback of what happens when the woman in black strikes. it acts like a mini story before the main bulk of the film.
Non Linear - Story not in chronological order, like Insidious . This is because it has flashbacks in messed up orders throughout the opening titles. there is no speech and delivers information in a compressed form almost acting like a montage.
Symbolic or Motif - The theme. Skyfall has a series of clips from the movies that show something in a build up to something big such as an explosion. This makes the audience want to go and see the film. It is a recurring thing that appears in the film. In a more horror style, the 'Morning routine' Dexter references death, blood and pain in simple every day occurrences.