What does karma do on Reddit?

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Tags

1. #gamification
2. #comments
3. #users
4. #pretty
5. #downvoted
6. #reddit
7. #anything
8. #redeemed
9. #posts
10. #website
11. #credits
12. #similar
13. #upvoted
14. #engage
15. #karma
16. #techniques
17. #quora