Is Google AdWords a waste of money?

Related questions

1. What are the uses of AdWords and AdSense?
2. Do ads work?
3. What is Google AdWords now called?
4. What does double click do?
5. Does BidVertiser pay per impression?
6. Is AdSense a PPC?
7. How much does Google AdSense cost?
8. When did AdWords become Google ads?
9. What is double click in Google AdWords?
10. How does DoubleClick for Publishers work?

Tags

1. #needs
2. #adwords
3. #marketing
4. #estimates
5. #gardner
6. #platform
7. #reach
8. #qualified
9. #large
10. #convert
11. #money
12. #google
13. #order
14. #message
15. #leads
16. #waste
17. #unbounce
18. #match
19. #targeted
20. #disagree