The Rank nominated by Google with their PageRank system. Google assigns a "popularity" rating to each page in their index on a scale of 1-10 so what they consider to be a good page might start around the 4-6 ranking mark an excellent page might be 7-10.

PageRank relies on the uniquely democratic nature of the web by using its vast Link structure as an indicator of an individual page´s value. In essence, Google interprets a Link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves "important" weigh more heavily and help to make other pages "important."

Important, high-quality sites receive a higher PageRank, which Google remembers each time it conducts a search. Of course, important pages mean nothing to you if they don´t match your query. So, Google combines PageRank with sophisticated text-matching techniques to find pages that are both important and relevant to your search. Google goes far beyond the number of times a term appears on a page and examines all aspects of the page´s content (and the content of the pages linking to it) to determine if it´s a good match for your query.