What is MMR in games?

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Tags

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