Does Google Analytics track unique visitors?

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Tags

1. #collect
2. #analytics
3. #reports
4. #additionally
5. #family
6. #person
7. #visitors
8. #updates
9. #first
10. #counted
11. #unique
12. #cookies
13. #google
14. #developer
15. #computer
16. #required
17. #people
18. #party