Introduction to Search Engines

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Introduction to Search Engines

  1. 1. Introduction to Search Engines What they are and how they work
  2. 2. With billions of web pages on theWorld Wide Web, how can you findexactly what youre looking for? By using a search engine.
  3. 3. What is a search engine?Basically, a search engine is a software program thatsearches for sites based on your search terms. Search engines look through their own databases of information to find what you’re looking for.
  4. 4. Search engines are specialized websites that help you find what yourelooking for on the Web.All you have to do is type in one ormore keywords, and the searchengine will look for matching web sitesfrom all over the Web.Google, Yahoo, and Bing are three ofthe most popular search engines.Each has its own unique features, butthe process of doing a search is verysimilar on each.
  5. 5. Comparing Search EnginesSearch for invention cellphone in the followingsearch engines and compare the results:(also notice that results at the very top and right-hand column are often paidads!)•Google google.com•Yahoo search.yahoo.com•Bing bing.com
  6. 6. How Do Search Engines Work?All search engines go by this basic process when conductingsearches, but because there are differences in search engines,there are bound to be different results depending on which engineyou use. 1. The searcher types a query into a search engine. 2. Search engine software quickly sorts through literally millions of pages in its database to find matches to this query. 3. The search engines results are ranked in order of relevancy.
  7. 7. Using the Search BarMany browsers have a built-in • To do a search, just type whatsearch bar, located to the right ofthe address bar. youre looking for (known as the search terms) in the search bar, and then press Enter. • Many browsers will also allow you to add to or change the search engines used by the search bar.
  8. 8. Search bar in Safari browser
  9. 9. Want to learn more about search engines?How search works test(3 min. video) The life span of a Google query is less then 1/2 second, and involves quite a few steps before you see the most relevant results. Heres how it all works.What is a browser? (1 min. video) What’s the difference between a browser, an operating system and a search engine? If you’re confused, this basic explanation will be enlightening.

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