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Search engine

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

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