Google Search

Google Search is a web search engine owned by Google Inc. and is the most-used search engine on the Web. Google receives several hundred million queries each day through its various services. Besides the main search engine feature of searching for text, the search engine can also be used as a calculator, base, unit and currency converter, dictionary and many other useful tools. Google search was originally developed by Larry Page and Sergey Brin in 1997.

Google's search algorithm uses a patented system called PageRank to help rank web pages that match a given search string. The PageRank algorithm computes a recursive score for web pages, based on the weighted sum of the PageRanks of the pages linking to them. The PageRank derives from human-generated links, and is thought to correlate well with human concepts of importance. The exact percentage of the total of web pages that Google indexes is not known, as it is very hard to actually calculate.

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