what is the difference between a teaser and a trailer?

Answer 1

Simply put, teasers are shorter, trailers are longer.
Teasers are usually early glimpses of the movie, and they generally last shorter than 1 or 2 minutes. They're usually released much earlier than trailers. So for example, Cars had a teaser where they showed Mater mowing into the bee and feeling sorry about it. Obviously, that was non-canonical as the movie later showed VW bugs as insects. And the NASCAR cars were more blocky and had less detail on their bodies. So teasers can have planned movie footage which later gets deleted or improved.
Trailers, on the other hand, are more substantial and show more final-version clips. They are longer, reveal more of the plot, and usually feature the final actors/voice actors. So using Cars again, the trailers were the ones shown at Superbowl with Larry actually voicing Mater, unlike the unknown actor for the bee teaser. The race cars are also tweaked to look better and have more decorations than the previous versions in the teaser.
Remember, teasers are meant to 'tease', without revealing much of the final product. 'Trailers' are long like, well, truck trailers. (For want of a better analogy)
So there you have it, the differences between a teaser and a trailer.

Answer 2

I think a teaser just gives you a glimpse of a movie still in post production to whet you appetite, a trailer is for an upcoming movie that ready to be released.

Answer 3

i think that teaser is the trailer that it show by pictures. it's not a moving picture, just many pictures that sequence. trailer is just like a short movie. it's moving. so i think the difference is teaser isn't a moving and it has sequence and trailer is a moving and it's just like a short movie

Answer 4

complicated situation. try searching using a search engine. that could help!