How Search Engine Work ?

SEO Optimization tips

Currently, there are three leading international search engines are Google, Yahoo/Bing. They each have their own databases and search algorithms. If you  want to do SEO work on blog or website , it is  necessary essential point that you understand and know how search engines work. SEO Optimization tips

Web Crawling  

• The web Crawler fetching all the web pages linked to a website. This work  is performed by a piece of software, called a crawler or a spider (Googlebot, case with Google).
• This means the crawler will look at the text on a website and looks for links to different web pages from that whole website.
• A web crawler does not daily visit every page on your website , when you do work or changes some pages then web crawler visit on your web pages with frequently.

Indexing 

• Indexing is the Process of creating index all fetched web pages on website and stored in a giant database, from where it can later be retrieved all index WebPages in the website.
• The web crawler will look for the page title, Header, text, keywords and Meta tags and other information to be stored in index databases.
• The  indexing is identifying the words and expressions that best describe the page and assigning the page to particular keywords.

Processing

• When a search engine user looks for keywords , Compares the search string in the search request with the indexed pages in the database.
• The search engine starts calculating the most relevant of each of the pages in its index with the search string. 
• The web server is responsible for displaying search results to the user in the form of an HTML page. 

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