Saxat från google.com
Citat:
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Voting Buttons - You can vote for or against a page or search result by using these buttons. Click the happy or unhappy faces to tell Google that you like or dislike a particular page. These buttons also can be used to report especially good or bad results after searching with Google. Indicate satisfaction or dissatisfaction with your results by clicking the appropriate button while still on the search results page. This feature is in test mode for now, so you won't see any immediate effects by voting for or against a page.
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Om det skall användas till ranking så är det sannolikt bara relaterat till dina egna sökningar.