According to me, no SEO interview questions guide is complete without this question.
Google’s mission is to organize all the information available across the globe and make it accessible and useful for one and all. In order to do that, Google Search works in three stages:
- Crawling
Crawling is the process of finding new or updated pages that Google can add to its database with automated programs called crawlers. The search engine will discover new pages when it follows a link from a page already known.
- Indexing
After a page is visited by the Googlebot or the Google crawler, Google attempts to determine the purpose of a page. Google analyses the page’s content, video and image files, and attempts to understand it. This data is stored in the Google Index, which is a large database that’s stored on many computers. This process is called indexing. While a majority of the pages are crawled before indexing, Google may also index pages without accessing their content (for example, if a page is blocked by a robots.txt directive).
- Serving Search Results (and ranking)
When a user searches for a particular query, Google attempts to locate the most relevant answer from its index based on many ranking factors. Google tries to provide its users the highest quality answer by considering factors such as the language, location, type of device used and previous queries.
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