What Is Search Engine.

 Search Engine

Search engines are programs that search documents for specified keywords and returns a list of the documents where the keywords were found. 

There are thousands of different search engines available on the Internet having different features and ability.The first search engine ever developed is considered Archie, which was used to search for FTP files and the first text-based search engine is considered Veronica. Today, the most popular and well known search engine is Google.



In all search engines there is a spider or crawler, which visits the web pages that will be crawled in the search and grabs the contents of each of those pages.Generally spider content ,title ,heading ,keyword etc relevant to page.Once a page has been crawled the data contained within the page is processed,this involves , grabbing the location of each of the words in the page, the frequency they occur, links to other pages, images, etc. This data is used to rank the page and is the primary method a search engine uses to determine if a page should be shown and in what order.

In short Let Me Show You How Search Engine Works

• 60  trillion individual pages
• Google navigates the web by crawling.
• That means  follow links from page to page.
• Maintain index of link.
• Sort the pages on the basis of their content and other factors. 
• Keep track of it all in the index. 
• Programs  & formulas to deliver the best results possible.
• Algorithms get to work looking for clues to better understand what you mean.
• Based on these clues, search engine pull relevant documents from the index. 

Top Search Engine & Their Global ranking till 27/July/14

• Google - Alexa Global Rank : 1
• Yahoo ! Search - Alexa Global Rank : 4
• Bing  - Alexa Global Rank : 24
• Ask - Alexa Global Rank : 34
• Aol Search - Alexa Global Rank:116

 

Click Here -How do i get my website on the top search engine.