Introduction to Search Engines
As recently as the 1990s, studies showed that most people preferred getting information from other people rather than from information retrieval systems.
Of course, in that time period, most people also used human travel agents to book their travel. However, during the last decade, relentless optimization of information retrieval effectiveness has driven web search engines to new quality levels where most people are satisfied most of the time, and web search has become a standard and often preferred source of information finding. For example, the 2004 Pew Internet Survey (Fallows 2004) found that “92% of Internet users say the Internet is a good place to go for getting everyday information.”
What are search engines? How do they work?
And finally but not last how much flexible are they?