Why would a yelp review be removed?

Related questions

1. Is Foursquare free?
2. Can Trustpilot be trusted?
3. What is yelp used for?
4. Does Foursquare still exist?
5. Can businesses hide yelp reviews?
6. Does yelp make money?
7. What is the purpose of Foursquare?
8. What is yelp and how does it work?
9. Are Google reviews better than yelp?
10. Why did yelp not recommend my review?

Tags

1. #recommended
2. #author
3. #missing
4. #there
5. #original
6. #deleted
7. #their
8. #content
9. #reasons
10. #guidelines
11. #terms
12. #infractions
13. #review
14. #could
15. #operations
16. #removed
17. #service
18. #filters
19. #violated