Does paid advertising work?

Related questions

1. What's the difference between Bing and Google?
2. Should I use Bing Ads?
3. Are Bing Ads cheaper?
4. How much do mobile ads pay?
5. How much do advertisers pay per click?
6. Do I have to pay for keywords?
7. How can I get paid for advertising?
8. What is Ad Center?
9. Are Bing ads worth it?
10. What is dynamic text in Bing Ads?

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9. #networks
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14. #views
15. #since
16. #their
17. #adwords
18. #allows
19. #price