What is YouTube activity feed?

Related questions

1. What is considered spam on YouTube?
2. Do Youtubers get notified when you subscribe?
3. Are YouTube views unique?
4. Can Youtubers see who has notifications on?
5. Does YouTube count your own views?
6. Does YouTube tell you when someone watches your video?
7. Do YouTube views count same IP?
8. How many subscribers do you need to get paid by YouTube?
9. Can Youtubers see who reported them?
10. What are YouTube metrics?

Tags

1. #youtube
2. #feeds
3. #particular
4. #contains
5. #channel
6. #marking
7. #action
8. #about
9. #information
10. #video
11. #uploading
12. #include
13. #reported
14. #actions
15. #resource
16. #rating
17. #sharing
18. #favorite
19. #taken
20. #forth
21. #activity