Google Page Rank Explained
Google 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.
Integrity
Google's complex, automated methods make human tampering
with their results extremely difficult. And though they do run
relevant ads above and next to their results, Google does not
sell placement within the results themselves (i.e., no one can
buy a higher PageRank). A Google search is an easy, honest and
objective way to find high-quality websites with information
relevant to your search.