At the beginning of internet time, human editors categorised web pages to facilitate search. It soon became apparent that this would be unfeasible, given that the number of webpages available on the World Wide Web is increasing exponentially. Current estimations place the number of web pages at 60 trillion, with more being added every day.
Today, search engines find, analyse and rank web pages according to mathematical algorithms written by super-clever super-geeks. Some well-known search al...
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