What is the difference between a teaser and a trailer?

Related questions

1. Do trailers start at movie time?
2. How long is a teaser trailer?
3. Is a teaser a trailer?
4. How long are trailers before movies?
5. What is the difference between a preview and a trailer?
6. How long should a trailer be for a short film?
7. How long are trailers at AMC?
8. How long are trailers at Regal?
9. Where are PJ Trailers made?
10. How long are truck trailers?

Tags

1. #content
2. #audience
3. #contain
4. #advertise
5. #awareness
6. #upcoming
7. #anticipation
8. #building
9. #create
10. #interest
11. #watching
12. #movie
13. #however
14. #information
15. #pretty
16. #trailer
17. #which
18. #teaser
19. #shorter
20. #short
21. #teasers