Film Trailers.

https://www.youtube.com/watch?v=kmxLybfGNC4 The 5th Wave.
https://www.youtube.com/watch?v=4M7LIcH8C9U The Notebook.
https://www.youtube.com/watch?v=it5XICr93wU Would You Rather.

Trailers are used to inform and entertain the audience to make them more tempted to watch the film. The three different trailers I looked at are all different genres. Action, Romance, Thriller/horror. The producers/makers of the film need the audience to go and see the film so that they can make money. Without the audience, there isn't a film. The trailers are used to make the audience aware of the film and it is used to show all the best bits of the film to encourage people to go and watch it.

The Hypodermic Needle theory means that the media inject ideas into the audience head to make them believe certain things. The Hypodermic Needle theory is used in each of the three trailers as they have to convince the audience that the film is worth going to see. The Hypodermic Needle is used when the trailer includes things like "the number one new film" or "the best film this year". This forces the audience to like the film as they know that everyone else will watch the film. This means that the media are able to control what people see. They can control what messages they want to give out to the audience.
The Users and Gratification theory is also used in the trailers. The first category in the Users and gratification is Forming Friendships.
Forming Friendships: Audience's watch certain films to relate to others. By people watching the same films, people have a common interest which leads to new friendships. The audience will watch films that they know are going to be popular so that they can be involved in all the conversations with other people. The audience don't want to be left outside the inner circle, so they will convince themselves to go and watch the film and it.
The next Category is Entertainment:
People watch certain films for entertainment and also escapism. Films allow the audience to live or view someone else's life. For example in Super hero movies they are able to live along side the heroes and experience everything they go through. People tend to watch films for entertainment as they get to experience other situations. The audience generally like to see things that normally wouldn't happen to them, e.g. car chases, as it is new and exciting.
These two categories, I think, apply to the trailers I have chosen. These three movies are big films in the Genre so their purpose really is to entertain people rather than educate them. Because they are big films, the audience are able to create conversations about them and relate to others due to their interest in the film.

The makers of the film cant control how the audience react to the film, so they have to use these trailers to try and persuade the audience to watch the film. The audience are then told f they like it or not as trailers try and exaggerate the film and what is in it so that people are tempted to watch it. The purpose of films is to make money and that is all that the film makers want from it. The more people they get to watch it, the more money they make.