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Page last updated at 07:25 GMT, Tuesday, 18 September 2012 08:25 UK

How Google fine tunes its search engine

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Competition between internet search engines is intense with companies constantly trying to get the edge over each other by improving their product.

Sumi Das goes inside Google to see how the internet giant tests the usability of its search engine to ensure those using it get the best possible results.

Follow the Click team on Twitter @BBCClick. And join the conversation on Google+ or Facebook.

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