What is the meaning of Google rank?

What is Google rank and what is the meaning of the statement "in googlerank Y!A is rated 10." I found this statement on Yahoo Answers written by a user and I am curious to find out what Google rank is and what is the significance of "Y!A is rated 10." I tried reading the Wikipedia article for PageRank for Google... show more What is Google rank and what is the meaning of the statement "in googlerank Y!A is rated 10." I found this statement on Yahoo Answers written by a user and I am curious to find out what Google rank is and what is the significance of "Y!A is rated 10." I tried reading the Wikipedia article for PageRank for Google but I did not understand much. Please tell me in simple words what is the meaning of "Google Rank" and "Y!A is rated 10". Thanks for your answers.
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