What does green dot mean on LinkedIn?

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Tags

1. #circle
2. #month
3. #connections
4. #introduced
5. #there
6. #messaging
7. #status
8. #connection
9. #active
10. #available
11. #means
12. #white
13. #linkedin
14. #their
15. #mobile
16. #quietly
17. #middle
18. #online
19. #green