Why do we need rebase in git?

Related questions

1. What is the difference between git add and git commit?
2. What is git ls remote?
3. How do I uninstall stash?
4. How do I stash new files in git?
5. What does git diff do?
6. Does git commit?
7. How do you undo a commit change in git?
8. How do I undo last commit?
9. Will git fetch overwrite local changes?
10. What is git clean?

Tags

1. #problem
2. #branches
3. #feature
4. #about
5. #rebased
6. #happen
7. #would
8. #think
9. #moves
10. #branch
11. #public
12. #example
13. #commits
14. #never
15. #master
16. #happened
17. #repository
18. #golden
19. #rebase