How Google Search Engines Work | How Search Engines Work: Crawling, Indexing, and Ranking

Google is a fully automated search engine that uses software known as “web crawlers“ to regularly search the web for sites to add to our index. In fact, the vast majority of sites mentioned in our results are located and added automatically when our web crawlers crawl the web, rather than being actively submitted for inclusion. Google search operates in three stages: Crawling: Google uses crawlers, which are automatic programmes that search the web for new or updated content. Google saves those page addresses (or page URLs) in a large list for subsequent reference. We find pages in a variety of ways, but the most common is via following connections from pages we already know about. Indexing: Google visits the pages it has discovered through crawling and attempts to analyse what each page is about. Google analyses the page’s content, photos, and video files to determine what the page is about. This data is saved in the Google index, a massive database that is spread across ma