HOW DO TRAILERS HELP FILL CINEMAS?

The marketing campaign must show how the film is different to all the other films out there so it stands out and make the target audience more likely to watch it. They do this my showing the unique selling point of the film (USP). This is what separates similar films from each other.
I watched three different trailers and analysed their unique selling point.

THE MUMMY
The USP to this film is that is gives a twist to the classic film as the 'mummy' is portrayed as this beautiful, tattooed, evil force who is set out to fight with the main character (Tom Cruise) showing no signs of weakness as she does so. The film puts the audiences on edge as we see the plane get bombarded with bat like animals causing the plane to loose control and spin down towards the ground all the while people are getting thrown out to their death.
The film is also shown to be set in modern life and the original was not, the audience can see this as there is a clip of London being destroyed and up in flames.
Finally, the powerful antagonist in the film is a female rather than a male.

BABY DRIVER
The audience may think this film is like any other car action film but upon further viewing we find out that the person with all the action and driving skills is a young faced man who's name is 'Baby'.
'Baby' is seen as an outsider and may have slight learning problems and so therefore the audience become intrigued by this and would want to find out more about how he became this way and developed his talent.

LADY MACBETH
This is a very chilling film with a strong female lead. We can see this as she challenges the man who's father bought her by saying that she 'must remain indoors at all times with her prayer book'. The next scene shows her outside by herself with her hair down. Towards the middle of the trailer the audience understand that she becomes very ruthless and controlling. She draws men in with her looks and charm and never lets them leave. We understand that the film becomes very unsettling and dark.