Teaser (noun)

1. A short advertisement or preview of a product, film, or event, intended to create interest or excitement.
2. A person who teases or provokes others.

Origin:

From tease.

Examples:

1. The movie trailer was a teaser for the upcoming film.
2. The teaser ad for the new phone was only 30 seconds long.
3. He was a teaser who loved to get a rise out of people.
4. The teaser campaign was very successful in creating buzz for the new product.
5. The teaser image was very intriguing and made people want to know more.