How do ranks work in overwatch?

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Tags

1. #scrutiny
2. #compete
3. #players
4. #amount
5. #granted
6. #according
7. #competitive
8. #overwatch
9. #games
10. #heroes
11. #skill
12. #level
13. #placement
14. #rating
15. #matches
16. #system
17. #through
18. #unlock
19. #ranking