SO we billions of people every day search in google. For their needs and queries. But did you know how google works behind your web browsing? There are thousands of billions of websites and web pages available in the cloud or web. So how Google knows what is the appropriate results for you.OK so let's dive into the answer. Google at first use a crawl, which is crawling through each and every website available on the web and make a list on Google's database and classify them by their topics. Then google use a specific type of algorithm to short out the list and rank the most useful ones by the feedback from us. So if you are a web developer or an owner of a website then you need to index your site to google to get a good number of visitors. To know more please visit- Google crawling-indexing/