When did Twitter become popular?

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Tags

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2. #rapidly
3. #dorsey
4. #march
5. #stone
6. #billion
7. #handled
8. #created
9. #service
10. #popularity
11. #users
12. #twitter
13. #search
14. #average
15. #worldwide
16. #queries
17. #launched
18. #gained
19. #williams
20. #glass
21. #posted
22. #tweets