How do secret conversations work on messenger?

Related questions

1. What happens when you ignore messages on Facebook?
2. Do I have to have Facebook to use messenger?
3. What happens if I uninstall Facebook Messenger?
4. Are messages on messenger private?
5. Is Facebook and Messenger the same thing?
6. Is Messenger on facebook private?
7. Do Facebook Messenger texts show up on phone bill?
8. Can anyone see your Facebook messages?
9. Can you use Facebook Messenger without being friends?
10. How can you tell if someone is on messenger?

Tags

1. #recipient
2. #right
3. #option
4. #corner
5. #bubbles
6. #encrypted
7. #first
8. #conversations
9. #elect
10. #however
11. #users
12. #device
13. #android
14. #normal
15. #secret
16. #black
17. #message
18. #upper