What does circulation mean in magazines?

Related questions

1. Is reach the same as impressions?
2. What is a circulation number?
3. Who is the target audience for GQ?
4. What does impressions from home mean on Instagram?
5. What is GQ in medical term?
6. How do you calculate readership from circulation?
7. What do you mean by readership?
8. What does reach and impressions mean on Instagram?
9. How is magazine circulation calculated?
10. How do you calculate reach impressions?

Tags

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2. #called
3. #magazines
4. #advertise
5. #magazine
6. #factors
7. #usually
8. #distributed
9. #always
10. #making
11. #which
12. #readers
13. #because
14. #determine
15. #copies
16. #without
17. #money
18. #circulation
19. #anything
20. #charge