How do keywords work in Google ads?

Related questions

1. How do I find out how many searches for a keyword?
2. Who is the most searched actor on Google?
3. What is keyword in SEO?
4. How do I find most searched keywords?
5. How can I improve my keywords?
6. How many keywords should ideally be in your keyword groups for SEM?
7. Are exact match keywords cheaper?
8. How many keywords should a website have?
9. How many keywords should be used in meta tags?
10. What is an example of a keyword?

Tags

1. #google
2. #words
3. #their
4. #relevant
5. #shown
6. #business
7. #search
8. #adwords
9. #phrases
10. #implies
11. #works
12. #entered
13. #enter
14. #information
15. #users
16. #allowing
17. #performing
18. #these
19. #advertisers
20. #keywords