Are messages on messenger private?

Related questions

1. How do secret conversations work on messenger?
2. Can you tell if someone blocked me on messenger?
3. Can I check Facebook messages without Messenger?
4. How can you tell if someone has read your Facebook Messenger?
5. How can you tell if someone is on Facebook Messenger?
6. What is secret conversation in Facebook Messenger?
7. Does Facebook use much data?
8. How do you know if someone is on messenger?
9. Can you get rid of Facebook and keep messenger?
10. How much data does FB Messenger use?

Tags

1. #secret
2. #messenger
3. #fully
4. #facebook
5. #answer
6. #chats
7. #conversations
8. #whatsapp
9. #question
10. #encrypted
11. #feature
12. #sending
13. #encryption
14. #conversation
15. #private