How does Google keyword planner work?

Related questions

1. Does Google Keyword Planner still exist?
2. What determines quality score?
3. How do you search for keywords in an article?
4. How do I find SEO keywords for my website?
5. Is Google Adwords Keyword Planner free?
6. How do you search keywords?
7. Is Google Keyword Planner accurate?
8. How do you find out what keywords are being searched?
9. Why my ads are not showing on AdWords?
10. Can you do SEO yourself?

Tags

1. #google
2. #planner
3. #estimator
4. #traffic
5. #campaigns
6. #creating
7. #keyword
8. #focus
9. #adwords
10. #version
11. #accounts
12. #process
13. #thing
14. #which
15. #groups
16. #getting
17. #advertisers
18. #doing
19. #through
20. #focused
21. #easier