Is iframe bad for SEO?

Related questions

1. Can Google crawl iFrame content?
2. Can you make iframe responsive?
3. Can you embed videos in WordPress?
4. Why iframe is used in HTML?
5. Is IFrame deprecated?
6. What is iframe TERA?
7. Are iframes responsive?
8. How do I use iframe in Wordpress?
9. What is responsive iframe?
10. Can an iframe be responsive?

Tags

1. #credit
2. #basically
3. #cloaking
4. #robots
5. #clearly
6. #original
7. #ranking
8. #coming
9. #doesn
10. #receive
11. #search
12. #referenced
13. #recognize
14. #engines
15. #source
16. #counted
17. #iframes
18. #different
19. #really
20. #content
21. #iframe