Do you know how Google search engine works?
Every search engine has three major functions, Crawling, Indexing and Fetching result based on user’s query. It produces the result to a query, with the most relevant data.
Collecting Information by Crawling
Search Engines have their own software program called as “web crawler”, which finds the pages available to the public. For Google, these are called “Googlebot”. A Google bot enters your page and go through the entire page content and links, and follows the link and submits this data to Google Server.
The crawling process starts when the website owner submits the sitemap to search engine. Crawler visits the site and checks the link. Higher priority is given to the new sites, changes to an existing site and the links that are not working anymore.
For Google, it is an automated process handled by the crawler, they decide which site to crawl and how often. Google is very particular about the quality of the search result and they don’t accept any mode of payment to crawl your sites.
World Wide Web is growing every second. People have different questions and different expectations of results.
“Every single day 15 percent of the questions people ask of Google are questions we’ve never seen before,”
John Wiley, lead designer for Google Search told Bloomberg TV’s Jon Erlichman.
Indexing is just like an index of any Book. You can find where the information is available using the index, which saves the time.
Matt Cutts from Google explains How Google Search Engine Works
You can check all the details about how google search engine works here
Here is Google Infographics for how Google Search Engine works.