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How Google Works PowerPoint Presentation

               
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On : Nov 26, 2013

In : Computers & Web

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How Google Works
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  • Slide 1 - How Works
  • Slide 2 - What happens when you Google?
  • Slide 3 - Google Cache Cached reveals the page as Google found it may differ from the current page Cached exists if a page is full-text indexed About 1 billion pages in Google are not cached Not fully searchable no Cached if a page owner requests not to be cached
  • Slide 4 - Boolean Searching And
  • Slide 5 - Default AND between terms The Fuzzy And only some of the words if a page is “important” words may occur only in link to the page words occur somewhere on the site a page belongs to
  • Slide 6 - Stemming Google stems “when appropriate” Includes plural, singular, past, present tense of words in search Search: school librarian Result: library, librarian, library’s, librarian’s Single word searches aren’t stemmed
  • Slide 7 - What Google doesn’t search Common or Stop words are ignored No official list from Google Auto-phrasing Searches containing only stop words
  • Slide 8 - What Google doesn’t search
  • Slide 9 - Google Search Results More than 100 factors in the metrics On-the-page metrics Word order matters Word frequency Automatic-phrasing In the title In unique fonts In prominent areas (like lists)
  • Slide 10 - PageRank Off-the-page metrics Words describing the link Links on one site to another are like votes-- PageRank Stuffing the ballot box Reputation of the ‘voting’ page Can’t buy a better PageRank PageRank independent of search terms
  • Slide 11 - Make searches better?
  • Slide 12 - Improving Google’s AND + Inclusion operator Force searches on stop words Turns off stemming Use quotation marks for phrases “public librarian” 234,000 .4% of public librarian 58,600,000 Forces searches on stop words Turns off stemming
  • Slide 13 - Improving Google’s AND Hyphen makes phrases and searches with and without hyphens bite-sized retrieves: bite-sized, bite sized, bitesized Other examples?
  • Slide 14 - Boolean Searching Or Not
  • Slide 15 - Search Operators OR search Search for two terms at once - exclusion operator Use with care; Search: twins Minnesota 2,750,000 Eliminate undesired words twins Minnesota –sports 1,300,000
  • Slide 16 - Search Operators * full-word wild card, word substitution Ideal for partly remembered quotes Searching for answers to questions Proximity searches ~ synonym operator ~guide searches for: tutorial, manual, help, map, tips
  • Slide 17 - Limitless Options for Limits Intitle: terms are searched for in title only Pages concentrate on term Hybrid cars intitle:mileage Combine with OR intitle:"new urbanism" OR intitle:"sustainable communities” allintitle: Combine with site: allintitle: hybrid cars mileage –site:.com
  • Slide 18 - Using URL’s Limit to a domain (edu, com, etc) site:edu OR site:gov OR site:lib.co.us Search within a site site:memory.loc.gov “dust bowl” Use Google as a search engine for a site Can ONLY use first part of URL Omit http: & final / inurl:dustbowl searches for term anywhere in URL
  • Slide 19 - Finding that file Filetype: Search for a particular type of document tax return filetype:pdf Exclude a filetype -filetype:xls Can use view as HTML Avoid viruses Allows you to read it even if you don’t have the software
  • Slide 20 - Thank You

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