Thursday, December 20, 2007

How the Page Ranked !!!

Google searches more sites more quickly, delivering the most relevant results.

Google runs on a unique combination of advanced hardware and software. The speed you experience can be attributed in part to the efficiency of our search algorithm and partly to the thousands of low cost PC's we've networked together to create a superfast search engine.
The heart of our software is PageRank™, a system for ranking web pages developed by our founders Larry Page and Sergey Brin at Stanford University. And while we have dozens of engineers working to improve every aspect of Google on a daily basis, PageRank continues to play a central role in many of our web search tools.


PageRank Explained

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 considerably more than the sheer volume of votes, or links a page receives; for example, 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." Using these and other factors, Google provides its views on pages' relative importance.

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 dozens of 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 our search results extremely difficult. And though we may 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 particular or higher placement). A Google search provides an easy and effective way to find high-quality websites that contain information relevant to your search.

Benefits Of Google

Benefits of a Google Search

1. Your search covers billions of URLs.
Google's index, comprised of billions of URLs, is the first of its kind and represents the most comprehensive collection of the most useful web pages on the Internet. While index size alone is not the key determinant of quality results, it has an obvious effect on the likelihood of a relevant result being returned.

2. You'll see only pages that are relevant to the terms you type.
Google only produces results that match all of your search terms or, through use of a proprietary technology, results that match very close variations of the words you've entered (e.g., if you enter "comic book", we may return results for "comic books" as well). The search terms or their variants must appear in the text of the page or in the text of the links pointing to the page. This spares you the frustration of viewing a multitude of results that have nothing to do with what you're looking to find.

3. The position of your search terms is treated with respect.
Google analyzes the proximity of your search terms within the page. Google prioritizes results according to how closely your individual search terms appear and favors results that have your search terms near each other. Because of this, the result is much more likely to be relevant to your query.

4. You see what you're getting before you click.
Instead of web page summaries that never change, Google shows an excerpt (or "snippet") of the text that matches your query -- with your search terms in boldface -- right in the search results. This sneak preview gives you a good idea if a page is going to be relevant before you visit it.

5. You can feel lucky and save time doing it.
Google excels at producing extremely relevant results, and flat out nails many queries such as company names. We're so confident, in fact, that we've installed an "I'm Feeling Lucky" button, which takes you directly to the site of the highest ranked result in your search. Try it and let us know if our confidence is justified.

6. You can get it, even when it's gone.
As Google crawls the web, it takes a snapshot of each page and analyzes it to determine the page's relevance. You can access these cached pages if the original page is temporarily unavailable due to Internet congestion or server problems. Though the information on cached pages is frequently not the most recent version of a site, it usually contains useful information. Plus, your search terms will be highlighted in color on the cached page, making it easy to find the section of the page relevant to your query.

http://www.googleadword.co.cc/