Imagine you double clicked your “FIRE FOX” and started searching for a website you need for which you know only the first name of the person who designed that website and nothing else… Literally to say you feel like running in a forest where you don’t know where the exit lies…

At this point of time to save you from the infinite INTERNET jungle there is a mougli who is ready to save you… and that is none another than “THE GOOGLE”…

THE GOOGLE SEARCH ENGINE:

The project started by Larry Page and Sergey Brin, as a PhD program is now one of the most influential companies on the World Wide Web: Google… At first, the student’s goal was to make an efficient search engine that gave users relevant links in response to search requests. While that’s still Google’s core purpose today, the company now provides services ranging from e-mail and document storage to productivity software and mobile phone operating systems.

Google’s search engine is a powerful tool, without which it would be practically impossible to find the information you need when you browse the Web. Like all search engines, Google uses a special Algorithm to generate search results.

Google uses automated programs called ‘Spiders’ or ‘Crawlers’ and also contains a large index of ‘Keywords’. Now let’s see how a Google spider works…

Google’s spiders regularly crawl the web to rebuild its index. Crawls are based on many factors such as Page Rank, links to a page, and crawling constraints such as the number of parameters in a URL. Any number of factors can affect the crawl frequency of individual sites. The crawl process is algorithmic; computer programs determine which sites to crawl, how often, and how many pages to fetch from each site.


Google uses a trademarked algorithm called ‘Page Rank’, which assigns each Web page a relevancy score.

A Web page’s Page Rank depends on a few factors:

  1. The frequency and location of keywords within the Web page: If the keyword only appears once within the body of a page, it will receive a low score for that keyword.
  2. How long the Web page has existed: People create new Web pages every day, and not all of them stick around for long. Google places more value on pages with an established history.
  3. The number of other Web pages that link to the page in question: Google looks at how many Web pages link to a particular site to determine its relevance.

Google looks at links to a Web page as a vote; it’s not easy to cheat the system. The best way to make sure your Web page is high up on Google’s search results is to provide great content so that people will link back to your page. The more links your page gets, the higher its Page Rank score will be. If you attract the attention of sites with a high Page Rank score, your score will grow faster.

Google initiated an experiment with its search engine in 2008. For the first time, Google is allowing a group of beta testers to change the ranking order of search results. In this experiment, beta testers can promote or demote search results and tailor their search experience so that it’s more personally relevant.

GOOGLE COOKIES:

As Google has grown, the company has added several new services for its users. Some of the services are designed to help make Web searches more efficient and relevant, while others seem to have little in common with search engines. With many of its services, Google has entered into direct competition with other companies.

Google’s specialized searches are an extension of its normal search engine protocol. With specialized searches, you can narrow your search to specific resources. You can enter keywords into Google and search for:

  1. Images related to your keywords
  2. Maps
  3. News articles or footage
  4. Products or services you can purchase online
  5. Blog entries containing the keywords you’ve chosen
  6. Content in books
  7. Videos
  8. Scholarly papers

In the last few years, Google has unveiled services that don’t relate to search engines upon first glance. For example, Google’s Gmail is a free Web-based e-mail program. When the service first launched, Google limited the number of users who could create accounts. The first group of users could invite a limited number of people to join the service, and so Gmail invitations became a commodity. Today, anyone can sign up for a free Gmail account.

Google is expanding its limits by stepping in the fields of operating systems, internet explorer and so on…

courtesy:google

Posted by

Gopi Chand (MGIT- ECE 3rd year)

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