Many visitors online consider the Internet encyclopaedia Wikipedia as the first and last termination in the search for a topic. User generated content to be very reliable so mendeklarasikannya Nature magazine as "a source who is almost as accurate as [Encyclopedia]." The site is quoted as a source of information in more than 100 decisions in U.S. courts since 2004. But its popularity also makes Wikipedia as a target by spammers, the case is so great that Wikipedia temporarily blocked access from all over the state of Qatar for the action editing. For business foil spammers, Wales decided to deletion tag "nofollow" on external links, notify search engines to ignore links to prevent the artificial increase of the target search engine rankings this link. This strategy ensures that the search for excellence Simple will continue to rise. But Wikipedia is just the first step of Wales. He also launched a personal search engine named WikiSeek is searching for sites mentioned in Wikipedia.
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