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Wondering how big the market is for SEO/SEM, anyone have any fresh, trustworthy, hard numbers?

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Google's total advertising revenues were USD$23 billion in 2009

http://en.wikipedia.org/wiki/AdWords

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Too much... :) in regards to SEO. 95% of seo is in the actual planning and design of a site/application. The rest is just building backlinks and promoting.

As for SEM, I would est 95% of what google makes per year to be from that. Try researching that figure.

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