Are you talking about Google Adwords? spend money on Google contextual advertising? There are plenty of similar ones like Yahoo Overture https://www.content.overture.com/d/ Kanoodle is another search engine. When you advertise with Yahoo, your ads will show up under MSN search, AOL, other popular search engines.
Depending on what you are advertising for? product/service? results can vary by the keywords you are picking to attract targetted customers.
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