Outcomes Studentswill be able to describe the three major types of search tools
Search ToolsSearch Engines, Directories, and Meta-SearchEngines… OH MY!
Chapter 3: Searching the WebDirectoriesA human-compiled hierarchical list of Web pages Organizes links in categories and subcategories Users drill down through categories and subcategories to find specific information 4
Chapter 3: Searching the WebDirectoriesA breadcrumb trail shows the hierarchical arrangement of categories and subcategories through which you have clicked Yahoo! was one of the first directories 5
Chapter 3: Searching the WebSearch Engines Three major components Spider, Bot, or Web crawler Index Search engine software 6
Chapter 3: Searching the WebSearch EnginesA spider or bot automatically browses the Web going from link to link to add and update its Web page index Search engine software compares search keywords to index and presents search results list 7
Chapter 3: Searching the WebSearch Engines Typical information collected by a spider Page title, URL, meta tag keywords Occurrence of keywords in page All of the words on the page Internal links Number and relevancy of other pages that link to the page 8
Search Engines Search engines use different algorithms to rank Web pages in a search results list Most search engines also include paid or sponsored listings on the search results page
Chapter 3: Searching the WebSearch Engines Some search tools provide special toolbars you can download as browser plug-ins 10
Chapter 3: Searching the WebMeta-Search Engines Compilesthe search results from multiple search engines into one list Some eliminate duplicates Watch for paid or sponsored listings in search results list metacrawler Dogpile Mamma Ixquick 11
The EndPlease proceed to the next lesson activity!