What does subscribe via RSS mean?

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Tags

1. #figured
2. #automatically
3. #reader
4. #technology
5. #essence
6. #receive
7. #basically
8. #subscribe
9. #might
10. #interest
11. #allows
12. #updates
13. #internet
14. #people
15. #standard
16. #based
17. #content
18. #simply