How Google Work

Today I would like to tell you how the the search engine Google founded by the two young brains Larry Page and Sergey Brin works...

The life span of a Google query is usually less than half a second, yet involves quite a few steps that must be completed before you see the most relevant results. Now lets get an idea of how this is done when you search Google, you're not searching the live web. Instead you're searching Google's index of the web which, like the list in the back of a book, helps you pinpoint exactly the information you need..

 Google has three distinct parts:

• Google-bot(also known as spider), a web crawler that finds and fetches web pages.

• The indexer that sorts every word on every page and stores the resulting index of words in a huge database.

• The query processor, which compares your search query to the index and recommends the documents that it considers most relevant.

       
     PageRank is Google’s system for ranking web pages. A page with a higher PageRank is deemed more important and is more likely to be listed above a page with a lower PageRank.Google considers over a hundred factors in computing a PageRank and determining which documents are most relevant to a query, including the popularity of the page, the position and size of the search terms within the page, and the proximity of the search terms to one another on the page.

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