The teaser trailer is a short ad. Translated to English language means to tease, to entice, to provoke, to bully, etc., in General one word can cause a violent reaction, thereby to bring him to the advertised object.
Teaser is different from the one people see every day on the streets. This is boring and mundane, the promise of man as a rule is transmitted in plain text on the big banner, without any intrigue and motive. In this is from the first glance it is clear that advertised. Teaser advertising works more subtly and unusually, it focuses on the innate curiosity of man, thus triggering in this mechanism of finding answers to sudden questions.