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December 28, 2006



Google's most expensive keywords in my experience are those for the SPAM subjects - credit repair ($8.90), Viagra ($9.11), Mortgage ($10.71), Mortgage Loans ($13.70), Gambling ($6.13), Drugs Canada ($6.90), Mortgage Rates ($13.00), Refinance ($16.70), etc...

My guess is people which look for these subjects subsidize "normal" Internet users, who typically don't click ads and therefore are basically free search users.

Although the adword keyword tool does not give a specific # for search volume for each keyword, "Credit card", "gambling", "mortgage", "poker" and "viagra" are all very close to the "maximum" side of the search volume rating bar, meaning they probably bring a very significant amount of cash to Google.

Overture search tool says there were 957,678 searches for the word "Mortgage" last month, and Google is said to have close to double the amount of search volume of Overture.

So, assuming Google has around 2,000,000 searches for "mortgage" a month, with a 2% Click thru rate on advertisements, and an average ad price of $10.71 for the keyword mortage, it looks like Google makes $428,400 / month, or $5,140,800 per year in revenue just from the keyword "mortgage".

Add on the other spam keywords and you're looking at somewhere between $50,000,000 -> $200,000,000 per year in revenue for the SPAM keywords, which helps balance out all the regular users nicely.


Thanks for the great comment, Ari. Interesting analysis.

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