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    Search engine Search engine Presentation Transcript

    • Search Engine and Meta Search Engine Submitted To:- Miss Shruti Jain Submitted by:- Kirandeep Kaur Sidhu NancyJain Sheena
    • 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.
    • 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.
    • 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.
    • 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.
    • 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.
    • 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
    • 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.
    • 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
    • How web search engines work
      • A search engine operates in the following order:
      • Web crawling
      • Indexing
      • Searching.
    • 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
    • Continued…
      • Book search
      • Earthquakes
      • Unit conversion
      • Synonym search
      • Dictionary definitions
    • 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.
    • 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
    • Architecture of a metasearch engine
    • 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.
    • 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 ( 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
    • Search Engine Operations
      • Following are the basic three operation of search engine:-
      • Crawling
      • Indexed documents
      • Processing Queries
    • References : Wikipedia
    • THanKu ! Any queries????