What is Tumblr known for?

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Tags

1. #tumblr
2. #altogether
3. #known
4. #posted
5. #short
6. #predates
7. #audio
8. #users
9. #files
10. #itself
11. #refers
12. #platform
13. #million
14. #microblogging
15. #entries
16. #photos
17. #videos
18. #tumblelogging