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Web spammers: Used their ability to fill the search results with pages
containing poor content and a lot of advertising.
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Black Hat search engine optimization (Black Hat SEO): Used by people who
employ their knowledge of search engines to make the search engine ranking
higher for pages they manipulated despite their poor quality. Unfortunately,
these issues still persist because every search engine, even the most evolved
ones, aren’t immune to people who want to game the system to obtain a
higher search engine ranking. The PageRank algorithm may eliminate many of
the older spammers and Black Hat SEO people, but it’s not a panacea.
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