How does RSS subscription work?

Related questions

1. What is a web based reader?
2. What can you do with an RSS feed?
3. How are Web feeds useful?
4. What is XML feed?
5. What is the benefit of RSS feed?
6. What is Feedly used for?
7. What is an RSS subscription?
8. Why are feed readers useful?
9. How do I add an RSS feed?
10. What is my RSS feed URL?

Tags

1. #developed
2. #channels
3. #feeds
4. #aggregators
5. #behalf
6. #about
7. #called
8. #sometimes
9. #automatically
10. #organize
11. #readers
12. #programs
13. #sites
14. #computer
15. #results
16. #special
17. #notifications
18. #access