Search engine


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Search engine

  1. 1. Search Engine and Meta Search Engine Submitted To:- Miss Shruti Jain Submitted by:- Kirandeep Kaur Sidhu NancyJain Sheena
  2. 2. Search Engine <ul><li>A web search engine is designed to search for information on the World Wide Web and FTP servers. </li></ul><ul><li>The search results are generally presented in a list of results </li></ul><ul><li>consist of web pages, images, information and other types of files </li></ul><ul><li>search engines operate algorithmically or are a mixture of algorithmic and human input. </li></ul>
  3. 3. Scope <ul><li>To get higher visibility of a website on Google, DMOZ, Yahoo, AltaVista, Dogpile and other search engines, it is necessary to implement better SEO techniques </li></ul><ul><li>Google has acquired the best search engine currently </li></ul><ul><li>Search Engine Optimization (SEO) is becoming increasingly noteworthy across the world especially in USA, UK, Europe, Australia and France. </li></ul>
  4. 4. Continued… <ul><li>Research has shown that, about 80% of internet traffic is generated through search engines. </li></ul><ul><li>Approximately 75% of the users staying only on the 1st page of the search results and only about 20% of the users go ahead to the 2nd page of the search result. </li></ul>
  5. 5. Types of Search <ul><li>Internal search -An internal search can only be used to find content on a single website (or intranet or extranet). </li></ul><ul><li>External or public search </li></ul><ul><li>A public search can be used to find content on any website, anywhere on the web. </li></ul><ul><li>Meta search engine meta search engine uses the indexes of other search engines to find content, anywhere on the web. </li></ul>
  6. 6. Search engine registration <ul><li>a search engine may also require basic information about your site, such as a short description of the website, topics covered, and owner. </li></ul><ul><li>After this, search engine will access the website using an indexing program (spider). </li></ul><ul><li>It then follows the links it finds on those WebPages, ‘crawling’ the entire website, to build a index of all the website content. </li></ul>
  7. 7. Continued… <ul><li>The registration process involves submitting an entry-level webpage address (URL) to a search engine. This entry-level page is typically the address of the homepage or sitemap </li></ul><ul><li>Goggle </li></ul><ul><li>Yahoo! (requires a Yahoo! account/registration) </li></ul><ul><li>Bing (formerly MSN Live) </li></ul><ul><li>Open Directory Projects </li></ul><ul><li>a search engine may also require basic information about your site, such as a short description of the website, topics covered, and owner </li></ul>
  8. 8. Search engine results <ul><li>The webpage listed at the top of the results page has been selected by the search engine as the most likely to provide the content the user is seeking. </li></ul><ul><li>Each search result listing usually features the destination webpage meta title. </li></ul><ul><li>a description and/or an excerpt showing the query highlighted in the context of the webpage content. </li></ul>
  9. 9. Search engine ranking algorithms <ul><li>Each search engine has its own method for calculating relevance, usually based on an analysis of the content of the destination webpage, including:- </li></ul><ul><li>meta title (visible at the top of the web browser window); </li></ul><ul><li>metadata ; </li></ul><ul><li>incoming link text </li></ul><ul><li>use </li></ul>
  10. 10. How web search engines work <ul><li>A search engine operates in the following order: </li></ul><ul><li>Web crawling </li></ul><ul><li>Indexing </li></ul><ul><li>Searching. </li></ul>
  11. 11. Different techniques of Searching on Google <ul><li>Search for a file type </li></ul><ul><li>Weather as reported by Google Search </li></ul><ul><li>Calculate and convert </li></ul><ul><li>Track stocks </li></ul><ul><li>get movie times </li></ul><ul><li>Track packages </li></ul><ul><li>Sports scores </li></ul><ul><li>Music </li></ul><ul><li>Phrase search </li></ul>
  12. 12. Continued… <ul><li>Book search </li></ul><ul><li>Earthquakes </li></ul><ul><li>Unit conversion </li></ul><ul><li>Synonym search </li></ul><ul><li>Dictionary definitions </li></ul>
  13. 13. Meta search engine <ul><li>Meta search engines are search engines that search other search engines. </li></ul><ul><li>a meta search engine submits your query to several other search engines and returns a summary of the results. </li></ul><ul><li>Often, the results returned by a meta search engine are not as relevant as those returned by a standard search engine </li></ul><ul><li>Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. </li></ul>
  14. 14. Continued… <ul><li>Meta search engines reduce the power of the bigger search engines. </li></ul><ul><li>Dog pile is perhaps the best-known Meta search engine. </li></ul><ul><li>Meta search engines save the time for the searcher by cutting down the number of search operations. </li></ul><ul><li>Most people use Google, yahoo, MSN-the big three search engines for search operations. </li></ul><ul><li>Meta search engines are capable of locating results that you might miss in primary engines </li></ul>
  15. 15. Architecture of a metasearch engine
  16. 16. Observations About Search Engine Operation <ul><li>The criteria and algorithms used vary from search engine to search engine. </li></ul><ul><li>The criteria and algorithms are complex, but are not published. </li></ul><ul><li>The criteria and algorithms change over time, as often as every 2 weeks. </li></ul><ul><li>There is consolidation among search engines, and new ones are being added continually. </li></ul><ul><li>Search engines reward simple pages with a high concentration of keywords and key phrases. </li></ul>
  17. 17. Continued… <ul><li>Search engines penalize old pages. </li></ul><ul><li>50% of search engines (including AltaVista and Google) will preferentially index pages with many links from the outside. </li></ul><ul><li>Some search engines ( reward how often a page is selected and how much time is spent with it. </li></ul><ul><li>Search engines reward repetition of keywords and key phrases, but penalize spamming. </li></ul><ul><li>Excite could only index 50 million URLs, would drop pages at random </li></ul>
  18. 18. Search Engine Operations <ul><li>Following are the basic three operation of search engine:- </li></ul><ul><li>Crawling </li></ul><ul><li>Indexed documents </li></ul><ul><li>Processing Queries </li></ul>
  19. 19. References : Wikipedia
  20. 20. THanKu ! Any queries????