What is MMR in gaming?

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Tags

1. #based
2. #determines
3. #history
4. #player
5. #medals
6. #after
7. #listed
8. #changes
9. #allows
10. #leaderboards
11. #showing
12. #ranking
13. #skill
14. #level
15. #ratings
16. #ranked
17. #matchmaking
18. #value
19. #match
20. #players
21. #their
22. #world
23. #rating
24. #seasonal
25. #highest