In 1998, Stanford University, Larry Page and Sergey Brin graduate students, "BackRub", based on a mathematical algorithm to assess the importance of web pages, a search engine developed. The amount of incoming links and PageRank algorithm to calculate the number of the function. [18] PageRank random Web page navigation links to a web page accessed by the user, and include the possibility that expected. In fact, this is a high PageRank are more likely to be reached by the random surfer, means that some links are stronger than others.
SEO
Page and Brin founded Google in 1998, [19] Google's simple design like a loyal following among the growing number of Internet users in the audience. (Eg PageRank and hyperlink analysis), off page factors are considered [20], as well as on-site (for example, keyword density, meta tags, headings, links and site structure) factors Google to activate the on-page search engine factors for the classification to avoid the kind of manipulation. PageRank game is difficult, though, webmasters already influence the Inktomi search engine and link building schemes, and these methods have proved to be applied in the same PageRank. Many of the sites, exchange buying and selling links, often on a large scale was not that busy. These projects, or link farms, some scholars us to create thousands of unique sites. [21]
By 2004, search engines link insidious factors in their ranking algorithms to reduce the impact of a number of undisclosed. In June 2007, the New York Times, "Saul Hansell Google ranks sites using more than 200 different signals. [22] The major search engines, Google, Bing and Yahoo, they will not disclose the use of algorithms assess the pages. Some of the SEO practice studied different approaches to search engine optimization for their personal opinions. [23] can get a better understanding of search engines search engine related patents. [24]
In 2005, Google began to customize the search results for each user. Depending on their previous search history, and registered users of Google results. [25] In 2008, Bruce Clay, because "the distinguished dead, he said. He felt his team to search for the potential of each user and each will be different, because to discuss how to be a secret site said. [26]
In 2007, Google PageRank, announced a campaign against paid links. [27] June 15, 2009, they use the nofollow attribute on links Google PageRank steps to mitigate the impact of the sculpture had been revealed. Matt Cutts, a Google software engineer, Google Bot PageRank sculpture NoFollow SEO service providers in the same way as for the prevention of treatment of nofollow links. [28] This change is a result of the evaporation use NoFollow PageRank. To avoid the above, SEO engineers and replaced with obfuscated Javascript nofollow tag PageRank sculpture of alternative methods developed in this way. It also proposed a number of solutions includes the use of Flash and Javascript iframe. [29]
In December 2009, to fill in the Google search results for all users would be using the web search history. [30]
June 8, 2010, a new web indexing system called Caffeine Google announced. results published much sooner than before after the news, forum posts and other content to allow you to find the change as Google caffeine for Google to update its index, Google will be faster than before. Kerry Grimes caffeine Google software engineer "Caffeine is our last index more than 50 percent of the healthier results ..." [31]
Google Instant, real-time search, the search results more timely and relevant to an attempt was launched in late 2010. Historically site administrators to improve the Web site optimization spent months or even years. engines change their algorithms, leading with the growing popularity of social media sites and blogs for new content to rank quickly within the search results as possible. [32]
