How Search Engine Works?

                       Nowadays internet is the biggest source of information.The number of websites increase on regular basis. It has been difficult to find the required information at right time.There are three paths to findd the information on internet which are Uniform Resource Locator (URL), Search Engine and Subject Gateways.Let us discuss Search Engine.

          Search Engine is a tool with help of which we get the number of websites lists about our query or concerned information. This information is spread through World Wide Web (WWW) where people across the entire world share information. These engines are operated by Web browsers.As mentioned above it is global platform so information available on this platforms are mammoth. The presence of such huge data create troubles to users to find the exact one.The most popular search engines are Google,Bing and Yahoo.
 
          Search Engine is comprises of 3 components.
   
     Robot: It scan the information available on webpages and send it to the search engine. Every search engine robot or crawler function differently according to the setting of software due to this same Keywords on different search engines produce different index or catalogue.

           Index: It keeps a single copy provided by robot in an order. It is also called catalogue.

          Search Engine Software:It enables the user to ask question and answer them in return with possible numbers of websites in an order.
   
          Classes Of Search Engines
                   There are a many search engines in digital world. In a wide way search engines are categorised into two categories.
                   
        Individual Search Engine: This type of engine use own crawler to get information from webpages.This engine is further classified into two other kinds , General search engines and Specific search enginem
             
           Meta Search Engines: This engine use more than one engine for index. These engines do not have their own content .These engines collect the content of other engines.

      Advantages of using Search Engine
                These engines normally scan each and every words of webpages on basis of keywords, quotes and phrases and index them according to query.

         Ranking Method
                   
                   Search engine crawl through millions of pages and put a catalogue . The most suitable to your query will be at top in this index. The crawler obey some rules set by engineer . The sum of these rules is called an algorithm.


       Location
            When a user put a query   then crawler search for keywords . The words in titles and at the top of paragraphs are scanned.