What is the use of RSS feed?

Related questions

1. Is SoundCloud an RSS feed?
2. Do I need an RSS feed for podcast?
3. What is my RSS feed?
4. What is an RSS feed URL?
5. How do I find an RSS feed?
6. What is an RSS feed error?
7. How do I find RSS feed URL?
8. What is an RSS feed and how does it work?
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10. Do RSS feeds still exist?

Tags

1. #aggregator
2. #entering
3. #feeds
4. #either
5. #subscribe
6. #device
7. #browser
8. #called
9. #mobile
10. #reader
11. #computer
12. #using
13. #software
14. #presented
15. #installed
16. #website
17. #users
18. #desktop
19. #built
20. #clicking