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Understanding Search Engines: How Google and Directories Shape Online Discovery

Search engines are powerful tools designed to find documents based on specified keywords. Over 80% of web visitors arrive via search engines, which evaluate websites using numerous factors like keywords and content. Google, for example, uses over 250 variables to determine relevance. Additionally, there are directory listings compiled by human editors, providing a structured way to categorize websites. Platforms like Dmoz and Yahoo! exemplify such directories, offering categorized listings to enhance user navigation. Explore the intricacies of search engines and their impact on the web.

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Understanding Search Engines: How Google and Directories Shape Online Discovery

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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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