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International click thru traffic is worth very little or none at all. On average, Google will pay close to a few pennies per click. A friend runs a site that gets over a thousand clicks every day but only manages to produce under twenty dollars on average per day. The website is content related with a well integrated Google 728×90 leaderboard banner, but according to Alexa the traffic is only ten percent from the United States.

Basically, when you are developing a website, focus on a majority of the traffic coming from the US to produce higher advertising revenue. This is because search engines consider international geo-targeted clicks remnant traffic. Concept is easy to understand: Would you pay good money for clicks from Lagos Nigeria? Answer is a simple no.