SEARCH ENGINE

Search engine is a tool designed to search for information on the web.The information may consist of web pages,images,information and other types of files. search engine gives you information related to your query. It create searche related to your query calculate relavancy according to your query and retrieve the desired result. Search engine is very good tool to reduce your effort to search any information on the web. Below of this blog i am giving you the work of search engines

work of search engine:-

1. crawling- search engine first of all crawls the web for the information. This task is done by a software called crawler or spider. spider follows links from one page to another and index everything they find on their way. It crawls whole website each and every page and crawls its content. After crawling it save the site's content in a database from where it can later retrieved.
   
2. Index- After page is crawled it is time to index its content.Essentially the process of indexing is identifying the words and expressions that best describe the page and assigning the page to particular keywords.
   
3. Processes-It compares the search string put by the user. When a search request comes the search engine processes.It compare the search string in the search request with the indexed pages. since it is likely that more than one pages contains the search string, the search engine starts calculating the relevancy of each of the pages in its index to the search string.
   
4. Calculating relevancy- When a user put any search string the search engine compare the search string with the most relevant site from its database. After that it index the site according to the relavancy to the search string. It shows that search engines work on human tendency.
   
5. Retrieving- After the comparison search engine retrieves the webpage that is relavant to the user search. The retrieving process takes less than a second . And after getting the information realated to the user the search engine's work is finished.