What is a MacGuffin in a movie?

Related questions

1. Can I pass the Turing test?
2. How did ex machina end?
3. Is annihilation related to ex machina?
4. Can machines think Turing?
5. Is the Turing test a good test for intelligence?
6. What is an allegory example?
7. Where ex machina was filmed?
8. Does Caleb die in ex machina?
9. What is the purpose of the Turing test?
10. Why do they call it Ex Machina?

Tags

1. #motivation
2. #mcguffin
3. #insignificant
4. #common
5. #especially
6. #necessary
7. #object
8. #sometimes
9. #itself
10. #fiction
11. #thrillers
12. #unimportant
13. #technique
14. #characters
15. #event
16. #films
17. #device
18. #macguffin
19. #irrelevant