Provide a Detailed Description of the Search Mechanism Employed by Google

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The Answer is The results of a search (or query) performed by a user on Google or industry professionals refer to another search engine as organic or natural search. Search engines use different algorithms for determining the order of organic search results, but at Google the method is called PageRank. Google does not accept money for placement of links in organic search results. Instead, Web pages that have more pages linking to them are ranked higher. In addition to in-bound links, Google's organic search results also consider some 200 other signals, and the firm's search quality team is relentlessly analyzing user behavior for clues on how to tweak the system to improve accuracy.
What really happens is that you're searching what amounts to a copy of the Web that major search engines make, storing and indexing the text of online documents on their own computers. Google's index considers over one trillion URLs. To create these massive indexes, search firms use software to crawl the Web and uncover as much information as they can find. This software is referred to by several different names: software robots, spiders, and Web crawlers. Spiders start at the first page on every public server and follow every available link, traversing a Web site until all pages are uncovered.
Google crawls frequently updated sites, like those run by news organizations, as often as several times an hour. Rarely updated, less popular sites might only be reindexed every few days. The method used to crawl the Web also means that if a Web site isn't the first page on a public server, or isn't linked to from another public page, then it'll never be found.

Provide a Detailed Description of the Search Mechanism Employed by Google

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