How does firebase database work?

Related questions

1. Is firebase better than SQL?
2. What is firebase Auth?
3. What is storage bucket in firebase?
4. What kind of database does firebase use?
5. Is firebase a backend?
6. Is firebase realtime database free?
7. Is firebase free for commercial use?
8. What we can do with Firebase?
9. Does Google own firebase?
10. Can firebase store images?

Tags

1. #users
2. #cache
3. #offline
4. #firebase
5. #realtime
6. #between
7. #store
8. #nosql
9. #comes
10. #automatically
11. #online
12. #local
13. #database
14. #serve
15. #device
16. #changes
17. #synchronized
18. #hosted
19. #cloud