GOOGLE TECHNOLOGY- PAGERANK ®
(some chapters are taken from the official documentation on
google.com)
Googlerank Docs / ENG
/ Technology - Pagerank ®
Let's take a look at what's behind Google
when we're talking about it from a technical point of view..
Technically a search engine must be considered in three ways:
- Archive dimension, which means the total number of indexed
web pages
- Archive's update frequency.
- "Ranking"
system
For the 1 and 2 points, Google does not
differ that much from other search engines. Its real strenght
is the ranking system, which is named pagerank ®.
(From the words
of its creator, Larry Page and Sergey Brin)
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.
Google's complex,
automated methods make human tampering with our results extremely
difficult. And though we do run relevant ads above and next
to our 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.
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