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In December 2009 Google announced it would be using the web search history of all its users in order to populate search results.<ref>{{cite web |url=http://googleblog.blogspot.com/2009/12/personalized-search-for-everyone.html |title= Personalized Search for everyone|publisher=Google |accessdate=2009-12-14 }}</ref>
The Real-time-search was introduced in late 2009 in an attempt to make search results more timely and relevant. Historically site administrators have spent months or even years optimizing a website to increase search rankings. With the growth in popularity of social media sites and blogs the leading engines made changes to their algorithms to allow fresh content to rank quickly within the search results.<ref>{{cite web|title=Relevance Meets Real Time Web |publisher=[[Google Blog]]|url=http://googleblog.blogspot.com/2009/12/relevance-meets-real-time-web.html }}</ref>
[[File:Yahoo google Haifa.jpg|thumb|Yahoo and Google offices]]
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