How google search works?

When you are doing google search, you are actually searching a web. You are searching google index of the web. It is made up of over 60 trillion individual pages and it’s growing rapidly day by day.

Crawling and Indexing

Google navigates the web by crawling and this is performed by spiders i.e. googlebot. They sort the pages by the content of the website and many other factors. They index all the webpage and index the webpages they link to and similarly index all the webpages which are linked. They keep all the pages in giant database and it’s over 100 million gigabytes.

Google's Algorithms ( programs and formulas)

Google has its own algorithm to deliver you the best result as possible when you search anything. When we search a webpage, spider search the index of webpage that include that search term. Now, google’s algorithm try to better understand what you mean and look for synonym, spelling and other factors of each and every webpages in its database related to that keyword. Googlebot produce million results for that keyword. Spiders ( Googlebot ) check many number of times that how many times the search query is repeated in that webpages. Spiders checks each and every webpages. Does that keyword lies in title, content, link or in other places? Does that page include synonym for that word? Is this page from quality website or low quality web-site even spamming. How many backlinks does it have? Is it linking to quality site or non-quality site. Google combine all these factors and then rank the results. Google use over 200 factors to rank the results and they take only 1/8 second to display the result.

These are the way how google search works. But the way of crawling the web by google changes constantly. Recently possum update and panda4.0 update has been made by google in its algorithm and this updates are now, the major algorithm to determine the rank of the website .