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Search engines

Search engines. What do we search for?. Google Zeitgeist. Defining a Search Engine. A Search Engine is a program that searches documents for specified keywords and returns a list of the documents where the keywords were found. More than 80% of web-site visitors come from Search Engines.

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Search engines

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Presentation Transcript

  1. Search engines

  2. What do we search for? • Google Zeitgeist

  3. Defining a Search Engine • A Search Engine is a program that searches documents for specified keywords and returns a list of the documents where the keywords were found. • More than 80% of web-site visitors come from Search Engines.

  4. Search engines continue • A program developed to scan a web page • Scans the entire page • Indexes & lists it on the search engine • Evaluates a web page based on various factors (variables) such as keywords, page titles, body copy etc. • Listings are done automatically • Changes if you change some content on the website

  5. Google as SE • Consists of variables which determine whether the site is relevant to the search query or not • Unique to each Search Engine • Google has over 250+ variables

  6. Google

  7. Google - Crawler

  8. Google - Crawler

  9. Google - Crawler

  10. Google

  11. Google “dance”

  12. Google – “dance”

  13. Directory Listings

  14. Directory Listings • A web search tool compiled manually by human editors. • Websites are submitted with information such as a title and description • Assessed by an editor • If deemed suitable, listed under relevant subject categories

  15. Examples of Directories • Human Edited • User Categorized • User Classified • Independently Classified • Pay Per Click (PPC)

  16. Dmoz & Yahoo! • Dmoz: • Directory listings are provided to AOL, Google, Lycos and Netscape and many other web sites, directories & portals. Yahoo! • Yahoo! • Directory listings are supplied by Yahoo! editors • Require a fee for commercial sites

  17. Dmoz

  18. Summary

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