What does 1 person reached mean on Facebook?

Related questions

1. Can you tell who visits your Facebook page?
2. How do I find out who is following my Facebook page?
3. Can I download my Facebook?
4. What is the difference between reach and views on Facebook?
5. Can Facebook pages see who viewed?
6. How do I download all my data from Facebook?
7. What is Facebook reach?
8. How do I Analyse my Facebook page?
9. Can a business on Facebook see who viewed their profile?
10. Can you use Google Analytics for Facebook?

Tags

1. #course
2. #within
3. #users
4. #means
5. #total
6. #reaching
7. #organically
8. #organic
9. #result
10. #people
11. #friends
12. #feeds
13. #ticker
14. #reach
15. #number
16. #shared
17. #their
18. #unique