Does Google AdWords work for small business?

Related questions

1. What does learning mean in Google Adwords?
2. What does Eligible mean in Google AdWords?
3. Does Google AdWords really work?
4. Is Google AdWords the same as Google ads?
5. When did Google AdWords become Google ads?
6. How much does it cost to get Google AdWords certified?
7. How much is Google pay per click?
8. Is Google AdWords Now Google ads?
9. How are ads ranked on Google?
10. Do paused keywords affect quality score?

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