what is the differences and similarities between a teaser trailer and a trailer

Teaser trailer definition: A teaser is a short "Pre-trailer". The teaser begins the "Brand identity" of the upcoming movie and is shown prior to the movie release.Often it can be shown a year beforehand as evident with Breaking Dawn, the trailer being produced last year. This is a way of building up excitement, its effect being that the audience will want to watch it if all they are given is a small piece of information as it makes the trailer seem enigmatic.The fundamental purpose predominantly is to build up hype about the movie, to thus generate profitable financial income.

Trailer definition:A trailer or preview is an advertisement or a commercial for a feature film that will be exhibited in the future at a cinema. The term "trailer" comes from their having originally been shown at the end of a feature film screening.

differences between a teaser trailer and a trailer

1. teaser trailer is shorter in length whereas a trailer is usually longer  
2.  A trailer explores the narrative in more depth, outlining the characters whereas a teaser only hints at the story
3. the teaser is released in advance and ceases circulating when the film is approaching by which the trailer is then shown
4. A trailer is more straightforward whereas the teaser is meant to leave the reader confused
5. The teaser is usually shot before the filming has began, meaning that in can change whereas the trailer is a more accurate representation of what the film is about
6. Teasers usually have either minimal dialogue or none whereas film trailers often have an undercurrent of dialogue throughout be it non-diegetic or diegetic
7. Often a teaser can repeat the same clip or perhaps backtrack throughout the piece- which is something that I would like to replicate in our year 13 project-whereas a trailer shows a wide variety of clips
8. the trailer usually has background information such as director, score of music, characters ect whereas a teaser is simply shots instead of a film

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Similarities

1. They both have the same predominant purpose to entice a certain target audience, taking into consideration whether it would be a niche audience, women, men, young,old or a general audience
2. They are both to advertise the film and therefore to generate financial income

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