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Google Search Screenshot
Search engines are systems that enable users to search for documents on the World Wide Web.[1] Popular examples include Yahoo! Search, Bing, Google, and Most search engines display their results depending upon their importance, such as Google PageRank.[2]. Search engines usually perform three basic tasks: search the Internet based on important words, keep an index of the words they find and where they find them, and allow users to look for words or combinations of words found in that index.[3]

Popular search engines

Browser Hijackers

Browser Hijackers are mostly identified as a PUP (Potentially Unwanted Program), for hijacking the user's search engine, and redirecting them to their own. Read more here.


  1. Quinstreet Enterprise: What is search engines? - A Word Definition From; Definition from Webopedia. Retrieved 2014-01-13
  2. Computer Hope: What is search engine?; Definition from ComputerHope. Retrieved 2014-01-13
  3. HowStuffWorks, Inc: HowStuffWorks "How Internet Search Engines Work"; How Search Engines Work. Retrieved 2014-01-13