How search engine works!!

Hi Guys,
Today we will discuss on how search engine works. So let's get started!


So, how we view web pages and how search engines view web pages are different. Unlike humans, search engines are text-driven. Search engines crawl the Web, looks at a particular site to get an idea what a site is about.

Search engines perform several activities in order to deliver search results – crawling, indexing, processing, calculating relevancy, and retrieving.

Crawling - Crawling means follow a path. In SEO, crawling means following your links and crawling your Website. It is the process of fetching all the web pages linked to a website. This task is performed by a software, called a crawler or a spider (or Googlebot, in case of Google). Google looks or new and updated pages to be indexed.

P.S The number of pages on the Web is huge that it is impossible for a spider to visit a site daily just to see if a new or an updated page has appeared. So sometimes crawlers may not end up visiting your site for a month or two.

Indexing - It is the process of storing all the fetched web pages and keeping them into its database from where it can later be retrieved. So if a user searches something on Google,it identifies the words and expressions that best describe the page and assigns the page to particular keywords.

The site colon search query returns all the pages Google has indexed for the site.
site:http://www.abc.com/

Processing - When a search request comes, the search engine processes it, that is, it compares the search string(keywords or query) in the search request with the indexed pages in the database.

Calculating Relevancy - It is likely that more than one page contains the search string, so the search engine starts calculating the relevancy of each of the pages in its index to the search string.

Retrieving Results - The last step in search engine activities is retrieving the best matched results. Basically, it is nothing more than simply displaying them in the browser.


I hope this post was helpful for you, and i hope you are now aware of how search engine works and how you get search results for a particular search query that you search for and how it returns results for your query.

Will be back with another post soon.

BBye!!