There are two types of trailers. A teaser trailer is generally the first trailer released for a movie. These types of trailers consists of clips of scenes from the film and are generally fairly short. If the film is a comedy, the funniest bits and gags are shown. If the film is a horror flick, the preview will consist of a few jump scares and creepy images. It is to grab the audiences attention and make sure that they will be interested in seeing the film. Closer to the premiere of the film, the theatrical trailer will be released. This type of trailer lets on more about the plot of the film. Instead of showing just the most exciting aspects of a film, the plot will be explored, giving the audience a deeper look into what the film is about.
Unfortunately, trailers do not always provide an accurate representation of the films that they are attempting to market. Though previews may be fun to watch, they are extremely misleading. They generally offer only tidbits of information that can not let an audience member accurately judge the quality of a film.
(The first comment under this trailer says, "this trailer makes the movie look better then it actual is.")
A thrilling trailer can make a movie a lot of money even if the film itself is lacking. By showing only the funniest parts of comedies in trailers, the audience is convinced that the whole movie is even funnier. In reality, however, the best parts of the movie have already been revealed in the trailer. As a viewer this is frustrating, for you may spend up to fourteen dollars to see a movie in a theater, and then discover that it is much less intriguing than it appeared in the preview.
It is for this very reason, however, that previews are my favorite part of going to see a movie. The collection of previews shown at the beginning of the film allows you to briefly experience many different genres while never having to pay fourteen dollars to sit through a bad film. In the previews, every film looks like it is the best film that you will ever see!